So I've recently added a protocol/schema to a collection I got from
someone else, recompiled it, and added it to my scripts and am having
problems.
More specifically, it built just fine, and when REGISTERed in the script
that uses it to store a relation, it seems to work fine, but when I try
to use it to read that same relation back, I get the error:
[main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2999: Unexpected internal
error. Error instantiating com.work.logs.LogFormat$FirstMsg referred to by
firstp
With a stack trace of:
java.lang.RuntimeException: Error instantiating
com.work.logs.LogFormat$FirstMsg referred to by firstp
at
com.twitter.elephantbird.pig.proto.ProtobufClassUtil.loadProtoClass(Unknown
Source)
at
com.twitter.elephantbird.pig.proto.LzoProtobuffB64LinePigStore.getSchema(Unknown
Source)
at
org.apache.pig.impl.logicalLayer.LOLoad.determineSchema(LOLoad.java:186)
at org.apache.pig.impl.logicalLayer.LOLoad.getSchema(LOLoad.java:151)
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:851)
at
org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:63)
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1601)
at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1551)
at org.apache.pig.PigServer.registerQuery(PigServer.java:523)
at
org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:868)
at
org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:388)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)
at
org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:141)
at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:90)
at org.apache.pig.Main.run(Main.java:510)
at org.apache.pig.Main.main(Main.java:107)
Caused by: java.lang.ClassNotFoundException:
com.work.logs.LogFormat$FirstMsg
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 16 more
The protocol itself is pretty simple, just:
message FirstMsg{
optional string uid = 1;
optional int64 timestamp = 2;
optional string type = 3;
}
The other classes in the jar file seem to be loading just fine,
producing notices along the lines of:
[main] INFO com.twitter.elephantbird.pig.proto.ProtobufClassUtil - Using
com.work.logs.LogFormat$Apa mapped by apa
Any help figuring out why this is failing would be appreciated. I have a
strong suspicion that it's something simple that I just keep looking
past.
Thanks,
Kris
--
Kris Coward http://unripe.melon.org/
GPG Fingerprint: 2BF3 957D 310A FEEC 4733 830E 21A4 05C7 1FEB 12B3
