Are you using PigServer java api to run your Pig queries ? If so, are you trying to run multiple queries in different threads against same Pig server instance?
Ashutosh On Mon, May 17, 2010 at 13:57, Yonggang Qiao <[email protected]> wrote: > Hi, > > anyone has seen this error before? normally our script runs fine, but > sometime recently it began to throw this exception. also usually it > will go away if I rerun it. > > Caused by: java.lang.RuntimeException: Unable to find clone for op > Project 4-16 Projections: [9] Overloaded: false > at > org.apache.pig.impl.logicalLayer.LogicalPlan.clone(LogicalPlan.java:132) > at > org.apache.pig.impl.logicalLayer.LogicalPlanCloneHelper.<init>(LogicalPlanCloneHelper.java:66) > at > org.apache.pig.impl.logicalLayer.LogicalPlanCloner.getClonedPlan(LogicalPlanCloner.java:45) > at > org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:3009) > at > org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:1314) > at > org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:893) > at > org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:682) > at > org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:63) > at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1017) > at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:967) > at org.apache.pig.PigServer.registerQuery(PigServer.java:383) > at org.apache.pig.PigServer.registerQuery(PigServer.java:399) > at ... > > Thanks, > Yonggang >
