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  • Algorithm To Select Most Popular Places from Database

    - by Russell C.
    We have a website that contains a database of places. For each place our users are able to take one of the follow actions which we record: VIEW - View it's profile RATING - Rate it on a scale of 1-5 stars REVIEW - Review it COMPLETED - Mark that they've been there WISH LIST - Mark that they want to go there FAVORITE - Mark that it's one of their favorites In our database table of places each place contains a count of the number of times each action above was taken as well as the average rating given by users. views ratings avg_rating completed wishlist favorite What we want to be able to do is generate lists of the top places using the above information. Ideally, we would want to be able to generate this list using a relatively simple SQL query without needing to do any legwork to calculate additional fields or stack rank places against one another. That being said, since we only have about 50,000 places we could run a nightly cron job to calculate some fields such as rankings on different categories if it would make a meaningful difference in the overall results of our top places. I'd appreciate if you could make some suggestions on how we should think about bubbling the best places to the top, which criteria we should weight more heavily, and given that information - suggest what the MySQL query would need to look like in order to select the top 10 places. One thing to note is that at this time we are less concerned with the recency of a place being popular - meaning that looking at the aggregate information is fine and that more recent data doesn't need to be weighted more heavily. Thanks in advance for your help & advice!

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  • C++ : Avoid lot of boolean variable for multiple verification conditions in trading app

    - by Naveen
    Hi i am a junior dev in trading app... we have a order refresh verification unit. It has to verify order confirmation from exchange. We send a bunch of different request in bulk ( NEW, MODIFY, CANCEL ) to exchange... Verification has to happen for max N times with each T intervals for all orders. if verification successful for all the order before N retry then fine.. otherwise we need to indicate as verification unsuccessfull. i hv done a basic coding done in very urgent like below for( N times ) { for_each ( sent_request_order ) // SENT { 1) get all the refreshed order from DB or shared mem i.e REFRESHED 2) find current sent order in REFRESHED if( not_found ) not refreshed from exchange, continue to next order if( found ) case NEW : //check for new status, mark verification done case MODIFY : //check for modified status.. //if not mark pending, go to next order, //revisit the same after T time case CANCEL : //check for cancelled status.. //if not mark pending, go to next order, //revisit the same after T time } if( all_verified ) exit from verification. wait ( T sec ) } order_verification_pending, order_verification_done, order_visited, order_not_visited, all_verified, all_not_verified ... lot of boolean flags used for indication.. is there any better approach for doing this.... splitting responsibilities across the classes......???? i know this is not a general question.... but still flags are making me tidious to handle...

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  • .NET Regular Expression to find actual words in text

    - by Mehdi Anis
    I am using VB .NET to write a program that will get the words from a suplied text file and count how many times each word appears. I am using this regular expression:- parser As New Regex("\w+") It gives me almost 100% correct words. Except when I have words like "Ms Word App file name is word.exe." or "is this a c# statment If(ab?1,0) ?" In such cases I get [word & exe] AND [If, a, b, 1 and 0] as seperate words. it would be nice (for my purpose) that I received word.exe and (If(ab?1,0) as words. I guess \w+ looks for white space, sentence terminating punctuation mark and other punctuation marks to determine a word. I want a similar regular Expression that will not break a word by a punctuation mark, if the punctuation mark is not the end of the word. I think end-of-word can be defined by a trailing WhiteSpace, Sentence terminating Punctuation (you may think of others). if you can suggest some regular expression 9for VB .NET) that will be great help. Thanks.

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  • Git merge 2 new file with removed content and added content

    - by Loïc Faure-Lacroix
    So we are working in with 2 different repositories and both designers modified the same file. the problem is quite simple but I have no ideas how to solve it yet. Both files are marked as new since they have almost nothing in common except that file. When I try to merge from branch A to B it mark the parts added in A deleted in B and on the other side, what was added in B appears deleted in A. git seems to try to outsmart me when I know that I need almost every changes and nothing should be mark as deletion. I have 2 other branch that should merge without problem after these 2 branch. I can't merge them yet since there are some recent changes that may not merge really well too. I have to merge A and B = E then C and D = F and then hopefully E and F So the big question here is how can I do a completely manual merge that will mark every changes as conflict anything deleted anything added should be marked as conflict that I can solve by myself using an editor. Git is trying to outsmart me and fail terribly at it.

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  • Converting "A* Search" code from C++ to Java [on hold]

    - by mr5
    Updated! I get this code from this site It's A* Search Algorithm(finding shortest path with heuristics) I modify most of variable names and some if conditions from the original version to satisfy my syntactic taste. It works in C++ (as I can't see any trouble with it) but fails in Java version. Java Code: String findPath(int startX, int startY, int finishX, int finishY) { @SuppressWarnings("unchecked") LinkedList<Node>[] nodeList = (LinkedList<Node>[]) new LinkedList<?>[2]; nodeList[0] = new LinkedList<Node>(); nodeList[1] = new LinkedList<Node>(); Node n0; Node m0; int nlIndex = 0; // queueList index // reset the node maps for(int y = 0;y < ROW_COUNT; ++y) { for(int x = 0;x < COL_COUNT; ++x) { close_nodes_map[y][x] = 0; open_nodes_map[y][x] = 0; } } // create the start node and push into list of open nodes n0 = new Node( startX, startY, 0, 0 ); n0.updatePriority( finishX, finishY ); nodeList[nlIndex].push( n0 ); open_nodes_map[startY][startX] = n0.getPriority(); // mark it on the open nodes map // A* search while( !nodeList[nlIndex].isEmpty() ) { LinkedList<Node> pq = nodeList[nlIndex]; // get the current node w/ the highest priority // from the list of open nodes n0 = new Node( pq.peek().getX(), pq.peek().getY(), pq.peek().getIterCount(), pq.peek().getPriority()); int x = n0.getX(); int y = n0.getY(); nodeList[nlIndex].pop(); // remove the node from the open list open_nodes_map[y][x] = 0; // mark it on the closed nodes map close_nodes_map[y][x] = 1; // quit searching when the goal state is reached //if((*n0).estimate(finishX, finishY) == 0) if( x == finishX && y == finishY ) { // generate the path from finish to start // by following the directions String path = ""; while( !( x == startX && y == startY) ) { int j = dir_map[y][x]; int c = '0' + ( j + Node.DIRECTION_COUNT / 2 ) % Node.DIRECTION_COUNT; path = (char)c + path; x += DIR_X[j]; y += DIR_Y[j]; } return path; } // generate moves (child nodes) in all possible directions for(int i = 0; i < Node.DIRECTION_COUNT; ++i) { int xdx = x + DIR_X[i]; int ydy = y + DIR_Y[i]; // boundary check if (!(xdx >= 0 && xdx < COL_COUNT && ydy >= 0 && ydy < ROW_COUNT)) continue; if ( ( gridMap.getData( ydy, xdx ) == GridMap.WALKABLE || gridMap.getData( ydy, xdx ) == GridMap.FINISH) && close_nodes_map[ydy][xdx] != 1 ) { // generate a child node m0 = new Node( xdx, ydy, n0.getIterCount(), n0.getPriority() ); m0.nextLevel( i ); m0.updatePriority( finishX, finishY ); // if it is not in the open list then add into that if( open_nodes_map[ydy][xdx] == 0 ) { open_nodes_map[ydy][xdx] = m0.getPriority(); nodeList[nlIndex].push( m0 ); // mark its parent node direction dir_map[ydy][xdx] = ( i + Node.DIRECTION_COUNT / 2 ) % Node.DIRECTION_COUNT; } else if( open_nodes_map[ydy][xdx] > m0.getPriority() ) { // update the priority info open_nodes_map[ydy][xdx] = m0.getPriority(); // update the parent direction info dir_map[ydy][xdx] = ( i + Node.DIRECTION_COUNT / 2 ) % Node.DIRECTION_COUNT; // replace the node // by emptying one queueList to the other one // except the node to be replaced will be ignored // and the new node will be pushed in instead while( !(nodeList[nlIndex].peek().getX() == xdx && nodeList[nlIndex].peek().getY() == ydy ) ) { nodeList[1 - nlIndex].push( nodeList[nlIndex].pop() ); } nodeList[nlIndex].pop(); // remove the wanted node // empty the larger size queueList to the smaller one if( nodeList[nlIndex].size() > nodeList[ 1 - nlIndex ].size() ) nlIndex = 1 - nlIndex; while( !nodeList[nlIndex].isEmpty() ) { nodeList[1 - nlIndex].push( nodeList[nlIndex].pop() ); } nlIndex = 1 - nlIndex; nodeList[nlIndex].push( m0 ); // add the better node instead } } } } return ""; // no route found } Output1: Legends . = PATH ? = START X = FINISH 3,2,1 = OBSTACLES (Misleading path) Output2: Changing these lines: n0 = new Node( a, b, c, d ); m0 = new Node( e, f, g, h ); to n0.set( a, b, c, d ); m0.set( e, f, g, h ); I get (I'm really confused) C++ Code: std::string A_Star::findPath(int startX, int startY, int finishX, int finishY) { typedef std::queue<Node> List_Container; List_Container nodeList[2]; // list of open (not-yet-tried) nodes Node n0; Node m0; int pqIndex = 0; // nodeList index // reset the node maps for(int y = 0;y < ROW_COUNT; ++y) { for(int x = 0;x < COL_COUNT; ++x) { close_nodes_map[y][x] = 0; open_nodes_map[y][x] = 0; } } // create the start node and push into list of open nodes n0 = Node( startX, startY, 0, 0 ); n0.updatePriority( finishX, finishY ); nodeList[pqIndex].push( n0 ); open_nodes_map[startY][startX] = n0.getPriority(); // mark it on the open nodes map // A* search while( !nodeList[pqIndex].empty() ) { List_Container &pq = nodeList[pqIndex]; // get the current node w/ the highest priority // from the list of open nodes n0 = Node( pq.front().getX(), pq.front().getY(), pq.front().getIterCount(), pq.front().getPriority()); int x = n0.getX(); int y = n0.getY(); nodeList[pqIndex].pop(); // remove the node from the open list open_nodes_map[y][x] = 0; // mark it on the closed nodes map close_nodes_map[y][x] = 1; // quit searching when the goal state is reached //if((*n0).estimate(finishX, finishY) == 0) if( x == finishX && y == finishY ) { // generate the path from finish to start // by following the directions std::string path = ""; while( !( x == startX && y == startY) ) { int j = dir_map[y][x]; char c = '0' + ( j + DIRECTION_COUNT / 2 ) % DIRECTION_COUNT; path = c + path; x += DIR_X[j]; y += DIR_Y[j]; } return path; } // generate moves (child nodes) in all possible directions for(int i = 0; i < DIRECTION_COUNT; ++i) { int xdx = x + DIR_X[i]; int ydy = y + DIR_Y[i]; // boundary check if (!( xdx >= 0 && xdx < COL_COUNT && ydy >= 0 && ydy < ROW_COUNT)) continue; if ( ( pGrid->getData(ydy,xdx) == WALKABLE || pGrid->getData(ydy, xdx) == FINISH) && close_nodes_map[ydy][xdx] != 1 ) { // generate a child node m0 = Node( xdx, ydy, n0.getIterCount(), n0.getPriority() ); m0.nextLevel( i ); m0.updatePriority( finishX, finishY ); // if it is not in the open list then add into that if( open_nodes_map[ydy][xdx] == 0 ) { open_nodes_map[ydy][xdx] = m0.getPriority(); nodeList[pqIndex].push( m0 ); // mark its parent node direction dir_map[ydy][xdx] = ( i + DIRECTION_COUNT / 2 ) % DIRECTION_COUNT; } else if( open_nodes_map[ydy][xdx] > m0.getPriority() ) { // update the priority info open_nodes_map[ydy][xdx] = m0.getPriority(); // update the parent direction info dir_map[ydy][xdx] = ( i + DIRECTION_COUNT / 2 ) % DIRECTION_COUNT; // replace the node // by emptying one nodeList to the other one // except the node to be replaced will be ignored // and the new node will be pushed in instead while ( !( nodeList[pqIndex].front().getX() == xdx && nodeList[pqIndex].front().getY() == ydy ) ) { nodeList[1 - pqIndex].push( nodeList[pqIndex].front() ); nodeList[pqIndex].pop(); } nodeList[pqIndex].pop(); // remove the wanted node // empty the larger size nodeList to the smaller one if( nodeList[pqIndex].size() > nodeList[ 1 - pqIndex ].size() ) pqIndex = 1 - pqIndex; while( !nodeList[pqIndex].empty() ) { nodeList[1-pqIndex].push(nodeList[pqIndex].front()); nodeList[pqIndex].pop(); } pqIndex = 1 - pqIndex; nodeList[pqIndex].push( m0 ); // add the better node instead } } } } return ""; // no route found } Output: Legends . = PATH ? = START X = FINISH 3,2,1 = OBSTACLES (Just right) From what I read about Java's documentation, I came up with the conclusion: C++'s std::queue<T>::front() == Java's LinkedList<T>.peek() Java's LinkedList<T>.pop() == C++'s std::queue<T>::front() + std::queue<T>::pop() What might I be missing in my Java version? In what way does it became different algorithmically from the C++ version?

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  • GRE keepalive with Linux and RouterOS

    - by eri
    I have a Linux host and couple of routerboadrs. I created a GRE tunnel, but Linux does not answer keepalive packages. Then router mark gre connection as unreachable, so I cant send to Linux host from router subnet. If linux sends something into tunnel (ping, etc.) - RouterOS mark connection as reacheble. Second and next packages routed nicely until one minute idle (no traffic). Tunnel in linux a make in this way: remote=x.x.x.x dev=gre21 network=10.21.0.0/16 ip tunnel add ${dev} mode gre remote ${remote} ttl 255 ip addr add 172.16.1.1/24 peer 172.16.1.21 dev ${dev} ip link set ${dev} up ip route add ${network} dev ${dev} And ip l: 14: gre21: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state UNKNOWN link/gre 0.0.0.0 peer 109.60.170.15 How to set state "running"? How to keep alive tunnel? Ping in cron?

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  • IPtables AWS EC2 NAT/Reverse NAT - For Reverse Proxy style setup but with IPtables

    - by Mark
    I was thinking initially needing to do a reverse proxy or something so I could get some SSL/TLS traffic look like it is being terminated at a server and IP address in the AWS cloud, and then that traffic is forwarded onto our actual web servers that aren't in the cloud... I've not done much iptables pre and post routing before Dnat or Snat which I know are the things I need or a combination of the things I need in order achieve what i'm trying. Things to note:- Client/User - Must not be able to see backend IP address and only see the IP address of the cloud box https (TLS/SSL) - connection shouldn't be terminated at the cloud box, it should act like a router almost EC2 instance - Has only one network interface available to play with... this is thus an (internet <- internet) type of routing going on. EC2 instance IP address is already more or less behind a NAT that I have no control over, for example... Public ip address could be 46.1.1.1 but instance IP will be 10.1.1.1. Connections from client will go to 46.1.1.1 which will end up at the instance and on interface 10.1.1.1. The connection from the client then needs to be forwarded (DNAT) onto the backend web servers which are back out on the internet (SNAT). Possibly a part of the problem could be that the SNAT will need to be set to the external interface of the instance and I wonder if this makes it harder for IPtables to track the connection? So looking to basically, have it look as though connections are terminating at this server and its IP address. Whereas all that's really happening is the https request and connection is being forwarded straight onto another internet facing web server. How possible does that sound?

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  • Handling bounced email when using a postfix smarthost

    - by Mark Rose
    I'm running a high availability cluster, and so far, most things work great. I have two external machines that act as outgoing mail hosts (smarthosts). The internal hosts are configured to relay all email through these two external facing hosts. My smarthosts' main.cf looks like this: myhostname = lb1.example.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = lb1.example.com, localhost relayhost = mynetworks = 127.0.0.0/8 10.1.248.0/24 My internal hosts' main.cf looks like this: mynetworks = 127.0.0.0/8 myhostname = web1.example.com mydestination = $myhostname, localhost.$mydomain, localhost relayhost = [10.1.248.3] smtp_fallback_relay = [10.1.248.2] lb1's internal IP is 10.1.248.2, and lb2's internal IP is 10.1.248.3. On the external hosts, email for root and www-data is forwarded to [email protected] with /etc/aliases. One advantage to using the smarthost setup is that spam filters and the like can connect back to the sending sending server. All email is sent fine, and headers look like this: Received: from lb2.example.com ([198.51.100.3]) by mx.google.com with ESMTP id y17si1571259icb.76.2011.01.13.18.20.32; Thu, 13 Jan 2011 18:20:32 -0800 (PST) Received-SPF: neutral (google.com: 198.51.100.3 is neither permitted nor denied by best guess record for domain of [email protected]) client-ip=198.51.100.3; Received: from db1.example.com (unknown [10.1.248.20]) by lb2.example.com (Postfix) with ESMTP id D364823C0BE for <[email protected]>; Thu, 13 Jan 2011 21:20:31 -0500 (EST) Received: by db1.example.com (Postfix) id C9FA7760D6A; Thu, 13 Jan 2011 21:20:31 -0500 (EST) Delivered-To: www-data@localhost Received: by db1.example.com (Postfix, from userid 0) id C1632760D6C; Thu, 13 Jan 2011 21:20:31 -0500 (EST) The problem is bounced/reject email. The external machine tries to forward the email back to the internal machine, e.g. www-data on web1 sending an email that bounces (such as a user signing up with a bad email address). An additional complication is using Google mail for the main example.com domain. In lieu of specifying every internal host in the external hosts' mydestination, is there a better way of setting things up, keeping in mind I can't adjust touch the mx for example.com?

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  • Web Client Service constantly in 'Stopping' state

    - by Mark
    I have a user who's Web Client service constantly reports that it's in the 'Stopping' state and it's hindering her ability to save JMP files to a SharePoint site using the UNC path. She's running Windows XP Service Pack 3. I've tried modifying the Web Client parameters in the registry for UseBasicAuth and FileAttributesLimitInBytes with no luck. When I set the service to Manual and then try to start it after Windows boots up, it starts and then immediately goes into the Stopping state again. Other things I've tried: Removing/Reinstalling her network card Removing/Reinstalling the Client for Microsoft Networks and File and Print Sharing Checked that the BITS and RPC services are running fine (not sure if they're related) Does anyone have any other ideas? Is there a way to repair/rebuild the Web Client service?

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  • Getting hp-snmp-agents on HP ProLiant DL360 on Lenny working

    - by mark
    After receiving our HP ProLiant DL360 I'd like to integrate the machine into our Munin system and thus enable ProLiant specific information to be exposed via SNMP. I'm running Debian Lenny with kernel 2.6.26-2-vserver-amd64 . I've followed http://downloads.linux.hp.com/SDR/getting_started.html and the HP repository has been added to /etc/apt/sources.list.d/HP-ProLiantSupportPack.list . Setting up Lenny SNMP itself is not a problem, I configure it to have a public v1 community string to read all data and it works. I install hp-snmp-agents and run hpsnmpconfig and it adds additional lines to the top of /etc/snmp/snmpd.conf : dlmod cmaX /usr/lib64/libcmaX64.so snmpd gets restarted. Via lsof I can see that libcmaX64 was loaded and is used by snmpd, put I do not get any additional information out of snmp. I use snmpwalk -v 1 -c public ... and I can see many OIDs but I do not see the new ones I'd expect, most notably temperatures, fan speed and such. The OIDs I'm expecting are e.g. 1.3.6.1.4.1.232.6.2.6.8.1.4.1 , this is from the existing munin plugins from http://exchange.munin-monitoring.org/plugins/snmp__hp_temp/version/1 . snmpd[19007]: cmaX: Parsing shared as a type was unsucessful snmpd[19007]: cmaX: listening for subagents on port 25375 snmpd[19007]: cmaX: subMIB 1 handler has disconnected snmpd[19007]: cmaX: subMIB 2 handler has disconnected snmpd[19007]: cmaX: subMIB 3 handler has disconnected snmpd[19007]: cmaX: subMIB 5 handler has disconnected snmpd[19007]: cmaX: subMIB 6 handler has disconnected snmpd[19007]: cmaX: subMIB 8 handler has disconnected snmpd[19007]: cmaX: subMIB 9 handler has disconnected snmpd[19007]: cmaX: sent ColdStarts on ports 25376 to 25393 snmpd[19007]: cmaX: subMIB 10 handler has disconnected snmpd[19007]: cmaX: subMIB 11 handler has disconnected snmpd[19007]: cmaX: subMIB 14 handler has disconnected snmpd[19007]: cmaX: subMIB 15 handler has disconnected snmpd[19007]: cmaX: subMIB 16 handler has disconnected snmpd[19007]: cmaX: subMIB 21 handler has disconnected snmpd[19007]: cmaX: subMIB 22 handler has disconnected snmpd[19007]: cmaX: subMIB 23 handler has disconnected snmpd[19007]: cmaX: subMIB 1 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 2 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 3 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 5 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 6 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 8 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 9 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 10 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 11 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 14 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 15 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 16 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 21 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 22 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 23 will be sent on port 25376 to hp Advanced Server Management_Peer snmpd[19007]: cmaX: subMIB 18 handler has disconnected snmpd[19007]: cmaX: subMIB 18 will be sent on port 25393 to cpqnicd snmpd[19007]: NET-SNMP version 5.4.1 This doesn't look particular bad for me, it's just informational I guess. I've compared the walking OID output with and without the module and there's no difference in the OID served back at all. Are there any other prerequisites I'm missing? I've also noticed that from the time I installed hp-snmp-agents it adds a lot of additional daemons and that my load suddenly jumps to 1. I've uninstalled the package for now. Is this expected behavior?

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  • Cannot open TUN/TAP dev /dev/as0t0: No such file or directory (errno=2)

    - by Mark
    I just attempted to install OpenVPN Access Server on my Debian VPS that uses OpenVZ. It installed fine, however when I try to start it from the administration panel, I get these errors: process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t0: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t1: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t2: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t3: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t4: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t5: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t6: No such file or directory (errno=2)'] service failed to start or returned error status process started and then immediately exited: ['Sat Sep 22 19:14:33 2012 Cannot open TUN/TAP dev /dev/as0t7: No such file or directory (errno=2)'] service failed to start or returned error status Is there a solution for this?

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  • certutil -ping fails with 30 seconds timeout - what to do?

    - by mark
    The certificate store on my Win7 box is constantly hanging. Observe: C:\1.cmd C:\certutil -? | findstr /i ping -ping -- Ping Active Directory Certificate Services Request interface -pingadmin -- Ping Active Directory Certificate Services Admin interface C:\set PROMPT=$P($t)$G C:\(13:04:28.57)certutil -ping CertUtil: -ping command FAILED: 0x80070002 (WIN32: 2) CertUtil: The system cannot find the file specified. C:\(13:04:58.68)certutil -pingadmin CertUtil: -pingadmin command FAILED: 0x80070002 (WIN32: 2) CertUtil: The system cannot find the file specified. C:\(13:05:28.79)set PROMPT=$P$G C:\ Explanations: The first command shows you that there are –ping and –pingadmin parameters to certutil Trying any ping parameter fails with 30 seconds timeout (the current time is seen in the prompt) This is a serious problem. It screws all the secure communication in my app. If anyone knows how this can be fixed - please share. Thanks. P.S. 1.cmd is simply a batch of these commands: certutil -? | findstr /i ping set PROMPT=$P($t)$G certutil -ping certutil -pingadmin set PROMPT=$P$G EDIT1 I have succeeded to pin down the single windows API that causes the problem - DsGetDcName According to the windbg, the certutil -ping invokes it like so: PDOMAIN_CONTROLLER_INFO pdci; DWORD ret = ::DsGetDcName(NULL, NULL, NULL, NULL, DS_DIRECTORY_SERVICE_PREFERRED, &pdci); On my workstation it times out for 30 seconds and then returns error code 1355, which is ERROR_NO_SUCH_DOMAIN No domain controller is available for the specified domain or the domain does not exist. On another machine, which is accidentally a windows server 2003, it returns almost immediately with the correct domain controller name inside the returned DOMAIN_CONTROLLER_INFO structure. Now the question is what is missing on my workstation for that API to find the correct domain controller?

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  • Virtual Machine Manager 2012 is showing 0% CPU usage

    - by Mark Henderson
    When trying to do some science to answer this question, I took a Windows 7 guest on a Server 2008 R2 host being managed by SCVMM 2012 and ran Prime95 on it to just generate some CPU usage. Here's the Guest: The Hyper-V host shows 12%, which is 1/8 cores (which is what is allocated), so that's looking correct: But SCVMM is showing 0%: I have left the stress test running for a long time, thinking that maybe SCVMM averages out over a long time (I thought it was 9 minutes, but I've been known to be wrong; just don't tell my wife). Why is SCVMM showing 0% when everything else seems to disagree?

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  • Download HP Power Protector for ESXi

    - by Mark Henderson
    The HP PowerProtector user guide states that to install the HP PowerProtector client on an ESXi Host: Download the latest version of HPPP from the HP website (http://www.hp.com/go/rackandpower). The ESXi Server is automatically detected, and a shutdown command script is generated. However in typical HP fashion, after clicking through no less than 6 different links to get to the downloads page, I am presented with: http://h18004.www1.hp.com/products/servers/proliantstorage/power-protection/software/power-protector/pp-dl.html HP Power Protector (HPPP) - Windows HP Power Protector (HPPP) - Linux x86 HP Power Protector (HPPP) - Linux x64 HP Power Protector (HPPP) - Linux IA64 HP Power Protector (HPPP) - HPUX The Linux packages contain an RPM and in no way resemble what is in the HP documentation. None of these are labelled for ESXi. Does anyone know where or how to get the HP Power Protector ESXi client installed?

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  • Re-Calibrate Toshiba battery meter with Windows 7

    - by Mark Henderson
    I have a Toshiba U300 laptop. Back in the olden days (circa-2000) you could re-calibrate the battery meter from the BIOS when your battery was no longer reading accurately. My battery was shot, so I bought a brand new one, however Windows 7 still seems to count down the battery life in at the same speed as the old one did. This time, when it alleged 0%, I turned the laptop back on and got another 90 minutes of life out of it, at 0%. Is there a tool or utility for Toshiba laptops that can fix it back to being accurate? I've read the other threads on SU about cycling the battery but that just doesn't seem to do it in this case. Update: After the last cycle, the battery meter now reads 100% but the indicator on the front of the laptop is still orange (indicating not fully charged)

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  • Windows Updates Fails Server 2008 0x80070490

    - by Mark Robinson
    I have a server with Windows Server 2008 Standard x64 Edition installed. This has been installed and running for several months and I have been able to successfully install previous Windows Updates. I have two pending updates that fail to install. (KB967723) Security update for Windows Server 2008 x64 Edition (KB976098) Update for Windows Server 2008 x64 Edition Fails with Error code: 80070490 Followed this off Microsoft support site, which basically says to repair Windows with the install DVD. When I get to the step to select upgrade I get the following error. Upgrade has been disabled. The upgrade cannot be started. To upgrade, cancel the installation and then choose to upgrade to a version of windows that is more recent then the version you are currently running. So basically feel like I've hit a dead end with out doing a complete reinstall. Any ideas ?

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  • Unexpected results from custom partitioning scheme - Ubuntu preseed unattended install

    - by Mark Renouf
    Hi... I need some help with partman-auto custom recipe in preseed.... it's doing unexpected things, the docs aren't so clear. This is in my preseed file: d-i partman-auto/expert_recipe string \ boot-root-var :: \ 1024 100 1024 ext4 \ $primary{ } $bootable{ } \ method{ format } format{ } \ use_filesystem{ } filesystem{ ext4 } \ mountpoint{ /boot } \ . \ 2048 50 4096 ext4 \ method{ format } format{ } \ use_filesystem{ } filesystem{ ext4 } \ mountpoint{ / } \ . \ 4096 25 100000 ext4 \ method{ format } format{ } \ use_filesystem{ } filesystem{ ext4 } \ mountpoint{ /var } \ . \ 256 75 100% linux-swap \ method{ swap } format{ } \ . Given an 80GB drive. I ended up with these partitions: / 2GB /boot 1GB /var 4GB swap 72GB What went wrong? What I want is: / 2GB /boot 1GB /var 72GB swap 4GB

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  • Restore monitor detection to one only or restore start menu to bottom

    - by Mark
    I have a co-worker that is no longer able to see his start menu. He used to have it pinned to the left edge of his screen. I tried to troubleshoot it a bit and discovered if we do Windows + R then "cmd" [enter] the command prompt opens (but we don't see the start menu or run box), meaning the start menu is somewhere, just off screen. Restarting doesn't help. Is there some way to force Windows to think it only has a single monitor? It seems to "think" it has two but there's only one and we can get the Start menu back. Or, is there a way to restore the start menu to the bottom? Additional info We are able to right-click the desktop for display settings, etc. We can also get into Windows Explorer (via Ctrl + E) so if we need any of that to restore settings we can do it.

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  • OpenJDK vs. Sun Java6 on Ubuntu

    - by Mark Renouf
    Due to past (bad) experience resulting from the GCJ stuff being provided by default on certain distributions, I've always traditionally installed the official Sun Java package on servers. On Ubuntu it's been easy but now OpenJDK is a preferred option and easier to install... I wonder: is there any reason not to use it instead? As far as I understand it's the open source version of the Sun JDK.

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  • Tomcat running, catalina throwing exception

    - by Mark Steudel
    So I have to preface that I'm not familiar with tomcat/catalina, but trying to troubleshoot this anyway. Anyway I see in /var/log/tomcat5/catalina.out I'm seeing these errors: Using CATALINA_BASE: /usr/share/tomcat5 Using CATALINA_HOME: /usr/share/tomcat5 Using CATALINA_TMPDIR: /usr/share/tomcat5/temp Using JRE_HOME: java.lang.ClassNotFoundException: org.apache.catalina.startup.Catalina at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.apache.catalina.startup.Bootstrap.init(Bootstrap.java:223) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:410) I'm not really sure what this means. This installation was working a week ago ... did something get corrupted? How would I figure if it did ... what other information would be valuable here? Tomcat seems to be running and starting up fine ... UPDATE: this might be related: Jun 19, 2011 11:00:25 PM org.apache.coyote.http11.Http11BaseProtocol pause INFO: Pausing Coyote HTTP/1.1 on http-9080 Jun 19, 2011 11:00:26 PM org.apache.catalina.core.StandardService stop INFO: Stopping service Catalina log4j:ERROR LogMananger.repositorySelector was null likely due to error in class reloading, using NOPLoggerRepository. Some more stuff in the logs: 2011-06-12 23:04:45,223 INFO [main] [com.atlassian.confluence.lifecycle] contextInitialized Starting Confluence 3.1.1 (build #1724) 2011-06-12 23:04:45,663 INFO [main] [beans.factory.xml.XmlBeanDefinitionReader] loadBeanDefinitions Loading XML bean definitions from c lass path resource [bootstrapContext.xml] 2011-06-12 23:04:46,134 INFO [main] [beans.factory.xml.XmlBeanDefinitionReader] loadBeanDefinitions Loading XML bean definitions from c lass path resource [setupContext.xml] 2011-06-12 23:04:46,236 INFO [main] [beans.factory.xml.XmlBeanDefinitionReader] loadBeanDefinitions Loading XML bean definitions from c lass path resource [bootstrapCacheContext.xml] 2011-06-12 23:04:47,571 INFO [main] [atlassian.plugin.manager.DefaultPluginManager] init Initialising the plugin system 2011-06-12 23:04:48,338 INFO [main] [atlassian.plugin.manager.DefaultPluginManager] init Plugin system started in 0:00:00.748 Jun 12, 2011 11:05:05 PM org.apache.catalina.startup.Catalina stopServer SEVERE: Catalina.stop: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:525) at java.net.Socket.connect(Socket.java:475) at java.net.Socket.<init>(Socket.java:372) at java.net.Socket.<init>(Socket.java:186) at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:395) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:344) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:435) Jun 12, 2011 11:05:44 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.pa th: /usr/java/jdk1.6.0_18/jre/lib/i386/client:/usr/java/jdk1.6.0_18/jre/lib/i386:/usr/java/jdk1.6.0_18/jre/../lib/i386:/usr/java/packag es/lib/i386:/lib:/usr/lib CLEAN LOG OUTPUT FROM STARTING TOMCAT: Using CATALINA_BASE: /usr/share/tomcat5 Using CATALINA_HOME: /usr/share/tomcat5 Using CATALINA_TMPDIR: /usr/share/tomcat5/temp Using JRE_HOME: java.lang.ClassNotFoundException: org.apache.catalina.startup.Catalina at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.apache.catalina.startup.Bootstrap.init(Bootstrap.java:223) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:410) So I did a /etc/rc.d/init.d/tomcat status and I get this: [wqadm1n@ip-72-167-51-178 proc]$ sudo /etc/rc.d/init.d/tomcat5 status /etc/rc.d/init.d/tomcat5 is stopped [wqadm1n@ip-72-167-51-178 proc]$ sudo /etc/rc.d/init.d/tomcat5 start Starting tomcat5: [ OK ] [wqadm1n@ip-72-167-51-178 proc]$ sudo /etc/rc.d/init.d/tomcat5 status lock file found but no process running for pid 30774

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  • fail2ban Error Gentoo

    - by Mark Davidson
    Hi All I've recently setup a new VPS running Gentoo (My first time using the distro so please forgive me is this is a really easy one) and as I've done with other servers installed fail2ban. Setting it up to block the host via iptables, on too many unsuccessful logins with ssh. However I'm getting a strange error that I can't quite solve. When I start fail2ban I get these lines in the error log 2009-11-13 18:02:01,290 fail2ban.jail : INFO Jail 'ssh-iptables' started 2009-11-13 18:02:01,480 fail2ban.actions.action: ERROR iptables -N fail2ban-SSH iptables -A fail2ban-SSH -j RETURN iptables -I INPUT -p tcp --dport ssh -j fail2ban-SSH returned 100 If I try and force a ban these errors show up in the log and the host is not banned 2009-11-13 11:23:26,905 fail2ban.actions: WARNING [ssh-iptables] Ban XXX.XXX.XXX.XXX 2009-11-13 11:23:26,929 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-SSH returned 100 2009-11-13 11:23:26,930 fail2ban.actions.action: ERROR Invariant check failed. Trying to restore a sane environment 2009-11-13 11:23:27,007 fail2ban.actions.action: ERROR iptables -N fail2ban-SSH iptables -A fail2ban-SSH -j RETURN iptables -I INPUT -p tcp --dport ssh -j fail2ban-SSH returned 100 2009-11-13 11:23:27,016 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-SSH returned 100 2009-11-13 11:23:27,016 fail2ban.actions.action: CRITICAL Unable to restore environment My versions are as follows Linux masked 2.6.18-xen-r12 #2 SMP Wed Mar 4 11:45:03 GMT 2009 x86_64 Intel(R) Xeon(R) CPU E5504 @ 2.00GHz GenuineIntel GNU/Linux net-analyzer/fail2ban-0.8.4 net-firewall/iptables-1.4.3.2 If anyone could shead some light on these errors that would be great, I did wonder if it was a problem with iptables or some kernel modules but I can block an IP if I do. iptables -I INPUT -s 25.55.55.55 -j DROP so makes me think its something a bit more unusual. Thanks a lot in advance

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