Hive freezes and takes 100% cpu when missing an HDFS block
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Key: HIVE-2766
URL: https://issues.apache.org/jira/browse/HIVE-2766
Project: Hive
Issue Type: Bug
Components: CLI, Query Processor
Environment: Reproduced on Cloudera 3
Reporter: Maxime Brugidou
When a block is corrupt or missing from HDFS (due to the failure of multiple
nodes), Hive jobs hang mysteriously at the beginning (without starting the M/R
job):
{code}
Launching Job 2 out of 4
Number of reduce tasks not specified. Estimated from input data size: 2
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>
{code}
The java process takes 100% of 1 CPU, and never stops, i had to kill manually
all my hive jobs.
It would be nice if the processes could fail with an appropriate exception
rather than hanging.
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