Hive should fail to start if it cannot get an instance of the filesystem
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Key: HADOOP-4544
URL: https://issues.apache.org/jira/browse/HADOOP-4544
Project: Hadoop Core
Issue Type: Bug
Components: contrib/hive
Reporter: Jeff Hammerbacher
Hey,
If I try to start Hive without my HDFS instance running, and Hive isn't able to
start it up on its own, it should fail. Instead, I get a working Hive shell,
but any query returns
FAILED: Unknown exception : null
FAILED: Unknown exception : null
If I check "/tmp/{user.name}/hive.log", the error shows that the fs object was
never assigned correctly, resulting in an NPE when it is referenced:
2008-10-29 17:01:08,659 ERROR ql.Driver (SessionState.java:printError(242)) -
FAILED: Unknown exception : null
java.lang.NullPointerException
at org.apache.hadoop.hive.ql.Context.removeScratchDir(Context.java:72)
at org.apache.hadoop.hive.ql.Driver.close(Driver.java:287)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:131)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:147)
at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:244)
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:165)
at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68)
Either the error message needs to be more informative or Hive should fail if it
can't find the persistent store it needs. I can imagine wanting to run the Hive
shell against the metastore only, so perhaps straight failure without the fs
isn't the best option. Up to the Hive team.
Regards,
Jeff
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