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
