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From reena upadhyay <reena2...@gmail.com>
Subject Error in running udf that interacts with hive jdbc client
Date Wed, 01 Oct 2014 15:09:45 GMT
Hi,


I have a single argument udf that takes the sql string as a argument.
Inside the udf, I have used hive jdbc client to execute the query. My query
execution part inside udf is working fine and also I am able to get the
desired result from the query. My udf is returning a String.  I am getting
error in returning the result from the evaluate method of a udf.

Stack trace:

java.lang.RuntimeException: Error in configuring object
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:432)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1136)
	at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
	... 9 more
Caused by: java.lang.RuntimeException: Error in configuring object
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
	at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34)
	... 14 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
	... 17 more
Caused by: java.lang.RuntimeException: Map operator initialization failed
	at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.configure(ExecMapper.java:154)
	... 22 more
Caused by: org.apache.hadoop.hive.ql.exec.UDFArgumentException:
org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute
method public java.lang.String
com.impetus.ilabs.etloffload.udf.UDFType.evaluate(org.apache.hadoop.io.Text)
 on object com.impetus.ilabs.etloffload.udf.UDFType@3ff839e8 of class
com.impetus.ilabs.etloffload.udf.UDFType with arguments
{employeeudf.age:org.apache.hadoop.io.Text} of size 1
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDF.initializeAndFoldConstants(GenericUDF.java:148)
	at org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator.initialize(ExprNodeGenericFuncEvaluator.java:127)
	at org.apache.hadoop.hive.ql.exec.Operator.initEvaluators(Operator.java:931)
	at org.apache.hadoop.hive.ql.exec.Operator.initEvaluatorsAndReturnStruct(Operator.java:957)
	at org.apache.hadoop.hive.ql.exec.SelectOperator.initializeOp(SelectOperator.java:65)
	at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
	at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:460)
	at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:416)
	at org.apache.hadoop.hive.ql.exec.TableScanOperator.initializeOp(TableScanOperator.java:189)
	at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
	at org.apache.hadoop.hive.ql.exec.MapOperator.initializeOp(MapOperator.java:425)
	at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376)
	at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.configure(ExecMapper.java:133)
	... 22 more
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to
execute method public java.lang.String
com.impetus.ilabs.etloffload.udf.UDFType.evaluate(org.apache.hadoop.io.Text)
 on object com.impetus.ilabs.etloffload.udf.UDFType@3ff839e8 of class
com.impetus.ilabs.etloffload.udf.UDFType with arguments
{employeeudf.age:org.apache.hadoop.io.Text} of size 1
	at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:1243)
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDFBridge.evaluate(GenericUDFBridge.java:182)
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDF.initializeAndFoldConstants(GenericUDF.java:145)
	... 34 more
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:1219)
	... 36 more
Caused by: java.lang.ExceptionInInitializerError
	at com.impetus.ilabs.etloffload.udf.UDFType.getColType(UDFType.java:82)
	at com.impetus.ilabs.etloffload.udf.UDFType.evaluate(UDFType.java:76)
	... 41 more
Caused by: java.lang.RuntimeException:
java.lang.ClassNotFoundException: org.apache.hive.jdbc.HiveDriver
	at com.impetus.ilabs.etloffload.common.utils.HiveJDBCConnectionFactory.<init>(HiveJDBCConnectionFactory.java:27)
	at com.impetus.ilabs.etloffload.common.utils.HiveJDBCConnectionFactory.<clinit>(HiveJDBCConnectionFactory.java:15)
	... 43 more
Caused by: java.lang.ClassNotFoundException: org.apache.hive.jdbc.HiveDriver
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:186)
	at com.impetus.ilabs.etloffload.common.utils.HiveJDBCConnectionFactory.<init>(HiveJDBCConnectionFactory.java:23)
	... 44 more



Any help would be highle appreciated.

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