I have tested this simple UDF function locally. The function itself is properly implemented.
On Wed, Jul 21, 2010 at 3:54 PM, Ping Zhu <[email protected]> wrote: > Hi, > > I have a problem with calling a simple UDF function in Hive query. I > compiled the function and created a jar file on my local pc. Then the jar > file is sent to a remote Hive cluster and deployed. When this UDF function > is called in a Hive query, an error "FAILED: Unknown exception: null" > returns. I checked Hive log file, the detailed error message is: > > 2010-07-21 15:45:33,590 ERROR ql.Driver (SessionState.java:printError(248)) > - FAILED: Unknown exception: null > java.lang.NullPointerException > at > org.apache.hadoop.hive.ql.udf.generic.GenericUDFUtils$ConversionHelper.<init>(GenericUDFUtils.java:214) > at > org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge.initialize(GenericUDFBridge.java:140) > at > org.apache.hadoop.hive.ql.plan.exprNodeGenericFuncDesc.newInstance(exprNodeGenericFuncDesc.java:141) > at > org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.getFuncExprNodeDesc(TypeCheckProcFactory.java:444) > at > org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.getXpathOrFuncExprNodeDesc(TypeCheckProcFactory.java:541) > at > org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.process(TypeCheckProcFactory.java:634) > at > org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:80) > at > org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:83) > at > org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.walk(DefaultGraphWalker.java:117) > at > org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:95) > at > org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genExprNodeDesc(SemanticAnalyzer.java:5283) > at > org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genFilterPlan(SemanticAnalyzer.java:1005) > at > org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genFilterPlan(SemanticAnalyzer.java:991) > at > org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genBodyPlan(SemanticAnalyzer.java:4234) > at > org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.genPlan(SemanticAnalyzer.java:4714) > at > org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:5203) > at > org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:105) > at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:275) > at org.apache.hadoop.hive.ql.Driver.runCommand(Driver.java:320) > at org.apache.hadoop.hive.ql.Driver.run(Driver.java:312) > at > org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:123) > at > org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:181) > at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:287) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.util.RunJar.main(RunJar.java:156) > > > The versions of Hive installed on my local pc and remote Hive cluster are > 0.6 and 0.5 respectively. I copied corresponding jar files which are needed > to compile the UDF function from remote Hive cluster, but it still does not > work. > > Any suggestions/comments will be highly appreciated. > > Thanks and best regards, > > Ping >
