Yes, I 've tried the last one, but it does not work for me:
I investigate...
2010-02-25 16:46:03,679 | FATAL | Users | Main | Uncaught
handler: thread Users (17) exiting due to uncaught exception
java.lang.NullPointerException
at
org.apache.pig.impl.logicalLayer.LogicalPlanCloneHelper.visit(LogicalPlanCloneHelper.java:331)
at org.apache.pig.impl.logicalLayer.LOProject.visit(LOProject.java:404)
at org.apache.pig.impl.logicalLayer.LOProject.visit(LOProject.java:58)
at
org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:69)
at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
at
org.apache.pig.impl.logicalLayer.LogicalPlanCloneHelper.getClonedPlan(LogicalPlanCloneHelper.java:75)
at org.apache.pig.impl.logicalLayer.LOSort.clone(LOSort.java:213)
at
org.apache.pig.impl.logicalLayer.LogicalPlan.clone(LogicalPlan.java:115)
at
org.apache.pig.impl.logicalLayer.LogicalPlanCloneHelper.<init>(LogicalPlanCloneHelper.java:63)
at
org.apache.pig.impl.logicalLayer.LogicalPlanCloner.getClonedPlan(LogicalPlanCloner.java:45)
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:3083)
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:1370)
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:949)
at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:738)
at
org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:63)
at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1036)
at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:986)
at org.apache.pig.PigServer.registerQuery(PigServer.java:386)
at org.apache.pig.PigServer.registerQuery(PigServer.java:402)
Le 25/02/10 16:29, Jeff Zhang a écrit :
Hi Vincent,
Pig do not support multi-thread officially. But you can try patches here
https://issues.apache.org/jira/browse/PIG-240
On Thu, Feb 25, 2010 at 7:04 AM, Vincent Barat<[email protected]>wrote:
Hi,
I'm facing what seem to be re-entrance errors when using PIG through the
Java API.
I know that the PigServer object is not reentrant, so I instantiate several
PigServers and run them in separated threads. Even in that case, I face the
infamous exception "Unable to find clone for op Project 5-482 Projections:
[3] Overloaded: false".
Is there other reentrance issues in the PIG library?
2010-02-25 15:49:06,128 | ERROR | Errors | stderr | Caused by:
java.lang.RuntimeException: Unable to find clone for op Project 5-482
Projections: [3] Overloaded: false
2010-02-25 15:49:06,128 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.LogicalPlan.clone(LogicalPlan.java:139)
2010-02-25 15:49:06,129 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.LogicalPlanCloneHelper.<init>(LogicalPlanCloneHelper.java:63)
2010-02-25 15:49:06,129 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.LogicalPlanCloner.getClonedPlan(LogicalPlanCloner.java:45)
2010-02-25 15:49:06,129 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:3083)
2010-02-25 15:49:06,129 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:1370)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:949)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:738)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:63)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1036)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.PigServer$Graph.clone(PigServer.java:1079)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.PigServer.clonePlan(PigServer.java:390)
2010-02-25 15:49:06,130 | ERROR | Errors | stderr | at
org.apache.pig.PigServer.compileLp(PigServer.java:806)
2010-02-25 15:49:06,131 | ERROR | Errors | stderr | at
org.apache.pig.PigServer.compileLp(PigServer.java:793)
2010-02-25 15:49:06,131 | ERROR | Errors | stderr | at
org.apache.pig.PigServer.store(PigServer.java:510)
