[HIVE-11733] UDF GenericUDFReflect cannot find classes added by "ADD JAR"

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.2.1
• Component/s: UDF
• Assignee: Yibing Shi
• Reporter: Yibing Shi
• Created: 04/Sep/15 07:07
• Updated: 25/Oct/15 01:03
• Resolved: 25/Oct/15 01:03

Description

When run below command:

hive -e "add jar /root/hive/TestReflect.jar; \
select reflect('com.yshi.hive.TestReflect', 'testReflect', code) from sample_07 limit 3"

Get below error:

Failed with exception java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: UDFReflect evaluate

The full stack trace is:

15/09/04 07:00:37 [main]: INFO compress.CodecPool: Got brand-new decompressor [.bz2]
Failed with exception java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: UDFReflect evaluate
15/09/04 07:00:37 [main]: ERROR CliDriver: Failed with exception java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: UDFReflect evaluate
java.io.IOException: org.apache.hadoop.hive.ql.metadata.HiveException: UDFReflect evaluate
	at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:152)
	at org.apache.hadoop.hive.ql.Driver.getResults(Driver.java:1657)
	at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:227)
	at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:159)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:370)
	at org.apache.hadoop.hive.cli.CliDriver.executeDriver(CliDriver.java:756)
	at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:675)
	at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:615)
	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:606)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: UDFReflect evaluate
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDFReflect.evaluate(GenericUDFReflect.java:107)
	at org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator._evaluate(ExprNodeGenericFuncEvaluator.java:185)
	at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:77)
	at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:65)
	at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:77)
	at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:815)
	at org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:95)
	at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:424)
	at org.apache.hadoop.hive.ql.exec.FetchOperator.pushRow(FetchOperator.java:416)
	at org.apache.hadoop.hive.ql.exec.FetchTask.fetch(FetchTask.java:138)
	... 13 more
Caused by: java.lang.ClassNotFoundException: com.yshi.hive.TestReflect
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:190)
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDFReflect.evaluate(GenericUDFReflect.java:105)
	... 22 more

Issue Links

• duplicates: HIVE-9486 Use session classloader instead of application loader