I'm following basic Pig, Cassandra, Hadoop installation. Everything works just fine as a stand alone. No error. However when I tried to run the example file provided by Pig_cassandra example, I got this error.
[root@localhost pig]# /opt/cassandra/apache-cassandra-1.1.6/examples/pig/bin/pig_cassandra
-x local -x local /opt/cassandra/apache-cassandra-1.1.6/examples/pig/example-script.pig
Using /opt/pig/pig-0.10.0/pig-0.10.0-withouthadoop.jar. 2012-10-24 21:14:58,551 [main] INFO org.apache.pig.Main - Apache Pig version
0.10.0 (r1328203) compiled Apr 19 2012, 22:54:12 2012-10-24 21:14:58,552 [main] INFO org.apache.pig.Main - Logging error messages to: /opt/pig/pig_1351138498539.log 2012-10-24 21:14:59,004 [main] INFO org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - Connecting to hadoop file system at: file:/// 2012-10-24 21:14:59,472 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1070: Could not resolve CassandraStorage using imports: [, org.apache.pig.builtin., org.apache.pig.impl.builtin.] Details at logfile: /opt/pig/pig_1351138498539.log
Here is the log file
Pig Stack Trace
---------------
ERROR 1070: Could not resolve CassandraStorage using imports: [, org.apache.pig.builtin., org.apache.pig.impl.builtin.]
org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error during parsing. Could not resolve CassandraStorage using imports: [, org.apache.pig.builtin., org.apache.pig.impl.builtin.]
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1597)
at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1540)
at org.apache.pig.PigServer.registerQuery(PigServer.java:540)
at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:970)
at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:386)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:189)
at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:84)
at org.apache.pig.Main.run(Main.java:555)
at org.apache.pig.Main.main(Main.java:111)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
Caused by: Failed to parse: Cannot instantiate: CassandraStorage
at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:184)
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1589)
... 14 more
Caused by: java.lang.RuntimeException: Cannot instantiate: CassandraStorage
at org.apache.pig.impl.PigContext.instantiateFuncFromSpec(PigContext.java:510)
at org.apache.pig.parser.LogicalPlanBuilder.validateFuncSpec(LogicalPlanBuilder.java:791)
at org.apache.pig.parser.LogicalPlanBuilder.buildFuncSpec(LogicalPlanBuilder.java:780)
at org.apache.pig.parser.LogicalPlanGenerator.func_clause(LogicalPlanGenerator.java:4583)
at org.apache.pig.parser.LogicalPlanGenerator.load_clause(LogicalPlanGenerator.java:3115)
at org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerator.java:1291)
at org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerator.java:789)
at org.apache.pig.parser.LogicalPlanGenerator.statement(LogicalPlanGenerator.java:507)
at org.apache.pig.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:382)
at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:175)
... 15 more
Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 1070: Could not resolve CassandraStorage using imports: [, org.apache.pig.builtin., org.apache.pig.impl.builtin.]
at org.apache.pig.impl.PigContext.resolveClassName(PigContext.java:495)
at org.apache.pig.impl.PigContext.instantiateFuncFromSpec(PigContext.java:507)
... 24 more
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I googled around and got to this point from other stackoverflow user that identified the potential problem but not the solution.
Cassandra and pig integration cause error during startup
I believe my configuration is correct and the path has already been defined properly. I didn't change anything in the pig_cassandra file.
I'm not quite sure how to proceed from here. Please help?
