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From "Yibing Shi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-14609) HS2 cannot drop a function whose associated jar file has been removed
Date Tue, 23 Aug 2016 01:49:21 GMT
Yibing Shi created HIVE-14609:
---------------------------------

             Summary: HS2 cannot drop a function whose associated jar file has been removed
                 Key: HIVE-14609
                 URL: https://issues.apache.org/jira/browse/HIVE-14609
             Project: Hive
          Issue Type: Bug
            Reporter: Yibing Shi


Create a permanent function with below command:
{code:sql}
create function yshi.dummy as 'com.yshi.hive.udf.DummyUDF' using jar 'hdfs://host-10-17-81-142.coe.cloudera.com:8020/hive/jars/yshi.jar';
{code}

After that, delete the HDFS file {{hdfs://host-10-17-81-142.coe.cloudera.com:8020/hive/jars/yshi.jar}},
and *restart HS2 to remove the loaded class*.

Now the function cannot be dropped:
{noformat}
0: jdbc:hive2://10.17.81.144:10000/default> show functions yshi.dummy;
INFO  : Compiling command(queryId=hive_20160821213434_d0271d77-84d8-45ba-8d92-3da1c143bded):
show functions yshi.dummy
INFO  : Semantic Analysis Completed
INFO  : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:tab_name, type:string,
comment:from deserializer)], properties:null)
INFO  : Completed compiling command(queryId=hive_20160821213434_d0271d77-84d8-45ba-8d92-3da1c143bded);
Time taken: 1.259 seconds
INFO  : Executing command(queryId=hive_20160821213434_d0271d77-84d8-45ba-8d92-3da1c143bded):
show functions yshi.dummy
INFO  : Starting task [Stage-0:DDL] in serial mode
INFO  : SHOW FUNCTIONS is deprecated, please use SHOW FUNCTIONS LIKE instead.
INFO  : Completed executing command(queryId=hive_20160821213434_d0271d77-84d8-45ba-8d92-3da1c143bded);
Time taken: 0.024 seconds
INFO  : OK
+-------------+--+
|  tab_name   |
+-------------+--+
| yshi.dummy  |
+-------------+--+
1 row selected (3.877 seconds)
0: jdbc:hive2://10.17.81.144:10000/default> drop function yshi.dummy;
INFO  : Compiling command(queryId=hive_20160821213434_47d14df5-59b3-4ebc-9a48-5e1d9c60c1fc):
drop function yshi.dummy
INFO  : converting to local hdfs://host-10-17-81-142.coe.cloudera.com:8020/hive/jars/yshi.jar
ERROR : Failed to read external resource hdfs://host-10-17-81-142.coe.cloudera.com:8020/hive/jars/yshi.jar
java.lang.RuntimeException: Failed to read external resource hdfs://host-10-17-81-142.coe.cloudera.com:8020/hive/jars/yshi.jar
       	at org.apache.hadoop.hive.ql.session.SessionState.downloadResource(SessionState.java:1200)
       	at org.apache.hadoop.hive.ql.session.SessionState.add_resources(SessionState.java:1136)
       	at org.apache.hadoop.hive.ql.session.SessionState.add_resources(SessionState.java:1126)
       	at org.apache.hadoop.hive.ql.exec.FunctionTask.addFunctionResources(FunctionTask.java:304)
       	at org.apache.hadoop.hive.ql.exec.Registry.registerToSessionRegistry(Registry.java:470)
       	at org.apache.hadoop.hive.ql.exec.Registry.getQualifiedFunctionInfo(Registry.java:456)
       	at org.apache.hadoop.hive.ql.exec.Registry.getFunctionInfo(Registry.java:245)
       	at org.apache.hadoop.hive.ql.exec.FunctionRegistry.getFunctionInfo(FunctionRegistry.java:455)
       	at org.apache.hadoop.hive.ql.parse.FunctionSemanticAnalyzer.analyzeDropFunction(FunctionSemanticAnalyzer.java:99)
       	at org.apache.hadoop.hive.ql.parse.FunctionSemanticAnalyzer.analyzeInternal(FunctionSemanticAnalyzer.java:61)
       	at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:222)
       	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:451)
       	at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:311)
       	at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1194)
       	at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:1181)
       	at org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:134)
       	at org.apache.hive.service.cli.operation.SQLOperation.runInternal(SQLOperation.java:206)
       	at org.apache.hive.service.cli.operation.Operation.run(Operation.java:316)
       	at org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementInternal(HiveSessionImpl.java:425)
       	at org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementAsync(HiveSessionImpl.java:401)
       	at org.apache.hive.service.cli.CLIService.executeStatementAsync(CLIService.java:258)
       	at org.apache.hive.service.cli.thrift.ThriftCLIService.ExecuteStatement(ThriftCLIService.java:506)
       	at org.apache.hive.service.cli.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1313)
       	at org.apache.hive.service.cli.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1298)
       	at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
       	at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
       	at org.apache.hadoop.hive.thrift.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor.process(HadoopThriftAuthBridge.java:718)
       	at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:285)
       	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
       	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
       	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: File does not exist: hdfs://host-10-17-81-142.coe.cloudera.com:8020/hive/jars/yshi.jar
       	at org.apache.hadoop.hdfs.DistributedFileSystem$19.doCall(DistributedFileSystem.java:1219)
       	at org.apache.hadoop.hdfs.DistributedFileSystem$19.doCall(DistributedFileSystem.java:1211)
       	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
       	at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1211)
       	at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:340)
       	at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:292)
       	at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2014)
       	at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1983)
       	at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:1959)
       	at org.apache.hadoop.hive.ql.session.SessionState.downloadResource(SessionState.java:1186)
       	... 30 more

INFO  : Semantic Analysis Completed
INFO  : Returning Hive schema: Schema(fieldSchemas:null, properties:null)
INFO  : Completed compiling command(queryId=hive_20160821213434_47d14df5-59b3-4ebc-9a48-5e1d9c60c1fc);
Time taken: 0.297 seconds
INFO  : Executing command(queryId=hive_20160821213434_47d14df5-59b3-4ebc-9a48-5e1d9c60c1fc):
drop function yshi.dummy
INFO  : Completed executing command(queryId=hive_20160821213434_47d14df5-59b3-4ebc-9a48-5e1d9c60c1fc);
Time taken: 0.003 seconds
INFO  : OK
No rows affected (0.324 seconds)
0: jdbc:hive2://10.17.81.144:10000/default> show functions yshi.dummy;
INFO  : Compiling command(queryId=hive_20160821213434_b69fd2a2-ec0b-463c-821c-3273d834c0ab):
show functions yshi.dummy
INFO  : Semantic Analysis Completed
INFO  : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:tab_name, type:string,
comment:from deserializer)], properties:null)
INFO  : Completed compiling command(queryId=hive_20160821213434_b69fd2a2-ec0b-463c-821c-3273d834c0ab);
Time taken: 0.123 seconds
INFO  : Executing command(queryId=hive_20160821213434_b69fd2a2-ec0b-463c-821c-3273d834c0ab):
show functions yshi.dummy
INFO  : Starting task [Stage-0:DDL] in serial mode
INFO  : SHOW FUNCTIONS is deprecated, please use SHOW FUNCTIONS LIKE instead.
INFO  : Completed executing command(queryId=hive_20160821213434_b69fd2a2-ec0b-463c-821c-3273d834c0ab);
Time taken: 0.004 seconds
INFO  : OK
+-------------+--+
|  tab_name   |
+-------------+--+
| yshi.dummy  |
+-------------+--+
1 row selected (0.15 seconds)
0: jdbc:hive2://10.17.81.144:10000/default>
{noformat}

There are 2 problem to fix here:
# Returns an error to client if the dop function operation fails.
# Drop the function definition even though the associated jar file cannot be downloaded to
local file system.



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