Problem IIS 7.0 Locking files durring upload

Posted by viscious on Server Fault See other posts from Server Fault or by viscious
Published on 2010-04-13T20:10:34Z Indexed on 2010/04/13 20:13 UTC
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iis7

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ftp

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ftp-server

I am running a server 2008 with iis7 and the ftp addon on to iis 7.0

I have the ftp site configured and mostly working

Except that about 70% of the time when transferring a file the upload will hang forever. If I disconnect the ftp client and reconnect and try to upload the same file I will get an error on the client saying the file is locked.

I have to restart the ftp service to clear the lock.

I fired up process explorer and did a search on the file in question and sure enough the ftp service has a lock on the file and it takes around 20 minutes to release the lock on its own (and sometimes longer). This lock stays around even after I disconnect the client.

Like I said this only happens about 70% of the time, the other 30% of the time it goes through just fine.

Things i have verified.

-Not a firewall issue. Server is using passive port range 8000-9000 which is allowed on the firewall. -Not a nat issue, server has a globally rout-able ip address -all recommended/required updates installed

I have 5 other servers in a very similar configuration and this is the only one i have problems with.

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