Thomas Friedrich created HIVE-14210:
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Summary: SSLFactory truststore reloader threads leaking in
HiveServer2
Key: HIVE-14210
URL: https://issues.apache.org/jira/browse/HIVE-14210
Project: Hive
Issue Type: Bug
Components: Hive, HiveServer2
Affects Versions: 2.1.0, 2.0.0, 1.2.1
Reporter: Thomas Friedrich
We found an issue in a customer environment where the HS2 crashed after a few
days and the Java core dump contained several thousands of truststore reloader
threads:
"Truststore reloader thread" #126 daemon prio=5 os_prio=0
tid=0x00007f680d2e3000 nid=0x98fd waiting on
condition [0x00007f67e482c000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at org.apache.hadoop.security.ssl.ReloadingX509TrustManager.run
(ReloadingX509TrustManager.java:225)
at java.lang.Thread.run(Thread.java:745)
We found the issue to be caused by a bug in Hadoop where the TimelineClientImpl
is not destroying the SSLFactory if SSL is enabled in Hadoop and the timeline
server is running. I opened YARN-5309 which has more details on the problem,
and a patch was submitted a few days back.
In addition to the changes in Hadoop, there are a couple of Hive changes
required:
- ExecDriver needs to call jobclient.close() to trigger the clean-up of the
resources after the submitted job is done/failed
- Hive needs to pick up a newer release of Hadoop to pick up MAPREDUCE-6618 and
MAPREDUCE-6621 that fixed issues with calling jobclient.close(). Both fixes are
included in Hadoop 2.6.4.
However, since we also need to pick up YARN-5309, we need to wait for a new
release of Hadoop.
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