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Hudson commented on HIVE-2778: ------------------------------ Integrated in Hive-trunk-hadoop2 #54 (See [https://builds.apache.org/job/Hive-trunk-hadoop2/54/]) HIVE-2778 [jira] Fail on table sampling (Navis Ryu via Carl Steinbach) Summary: HIVE-2778 fix NPE on table sampling Trying table sampling on any non-empty table throws NPE. This does not occur by test on mini-MR. <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>select count(*) from emp tablesample (0.1 percent); Total MapReduce jobs = 1 Launching Job 1 out of 1 Number of reduce tasks determined at compile time: 1 In order to change the average load for a reducer (in bytes): set hive.exec.reducers.bytes.per.reducer=<number> In order to limit the maximum number of reducers: set hive.exec.reducers.max=<number> In order to set a constant number of reducers: set mapred.reduce.tasks=<number> java.lang.NullPointerException at org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.sampleSplits(CombineHiveInputFormat.java:450) at org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getSplits(CombineHiveInputFormat.java:403) at org.apache.hadoop.mapred.JobClient.writeOldSplits(JobClient.java:971) at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:963) at org.apache.hadoop.mapred.JobClient.access$500(JobClient.java:170) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:880) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:833) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127) at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:833) at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:807) at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:432) at org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:136) at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134) at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57) at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1332) at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1123) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:931) at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:255) at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:212) at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:671) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:554) 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:186) Job Submission failed with exception 'java.lang.NullPointerException(null)' FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MapRedTask </pre> </div></div> Test Plan: EMPTY Reviewers: JIRA, cwsteinbach Reviewed By: cwsteinbach Differential Revision: https://reviews.facebook.net/D1593 (Revision 1301310) Result = ABORTED cws : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1301310 Files : * /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/CombineHiveInputFormat.java > Fail on table sampling > ----------------------- > > Key: HIVE-2778 > URL: https://issues.apache.org/jira/browse/HIVE-2778 > Project: Hive > Issue Type: Bug > Components: Query Processor > Affects Versions: 0.9.0 > Environment: Reproduced only on hadoop-0.20.2-CDH3u1, work fine on > hadoop-0.20.2 > Reporter: Navis > Assignee: Navis > Fix For: 0.9.0 > > Attachments: ASF.LICENSE.NOT.GRANTED--HIVE-2778.D1593.1.patch, > ASF.LICENSE.NOT.GRANTED--HIVE-2778.D1593.2.patch, HIVE-2778.D1593.2.patch > > > Trying table sampling on any non-empty table throws NPE. This does not occur > by test on mini-MR. > {noformat} > select count(*) from emp tablesample (0.1 percent); > Total MapReduce jobs = 1 > Launching Job 1 out of 1 > Number of reduce tasks determined at compile time: 1 > In order to change the average load for a reducer (in bytes): > set hive.exec.reducers.bytes.per.reducer=<number> > In order to limit the maximum number of reducers: > set hive.exec.reducers.max=<number> > In order to set a constant number of reducers: > set mapred.reduce.tasks=<number> > java.lang.NullPointerException > at > org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.sampleSplits(CombineHiveInputFormat.java:450) > at > org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getSplits(CombineHiveInputFormat.java:403) > at org.apache.hadoop.mapred.JobClient.writeOldSplits(JobClient.java:971) > at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:963) > at org.apache.hadoop.mapred.JobClient.access$500(JobClient.java:170) > at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:880) > at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:833) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127) > at > org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:833) > at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:807) > at > org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:432) > at > org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:136) > at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134) > at > org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57) > at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1332) > at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1123) > at org.apache.hadoop.hive.ql.Driver.run(Driver.java:931) > at > org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:255) > at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:212) > at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:403) > at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:671) > at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:554) > 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:186) > Job Submission failed with exception 'java.lang.NullPointerException(null)' > FAILED: Execution Error, return code 1 from > org.apache.hadoop.hive.ql.exec.MapRedTask > {noformat} -- This message is automatically generated by JIRA. 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