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From "Sid Wagle" <swa...@hortonworks.com>
Subject Review Request 41994: Add zookeeper tick time setting to AMS for embedded mode
Date Wed, 06 Jan 2016 21:58:54 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/41994/
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Review request for Ambari, Alejandro Fernandez, Aravindan Vijayan, and Sumit Mohanty.


Bugs: AMBARI-14572
    https://issues.apache.org/jira/browse/AMBARI-14572


Repository: ambari


Description
-------

Found out that we are not setting property "hbase.zookeeper.property.tickTime" for embedded
mode.
The AMS system initialization was stuck on Zookeeper being unresponsive for a few minutes
right at the start of the cluster. 
The possible cause is still unknown, only explanation is a long gc pause . 
However, Zookeeper session timedout on start. with the following message:
{code}
2016-01-05 10:24:10,000 INFO  [SessionTracker] server.ZooKeeperServer: Expiring session 0x152114fb0060001,
timeout of 40000ms exceeded
{code}
We set the session timeout to 120 seconds however the server session expires in 20 * _default_tick_time_
(2 seconds)
We can definitely increase this 3 fold by setting a property which should alleviate this situation.
*Note*: After auto-start brings up the daemon a second time, this does not reoccur.
{code}
2016-01-05 10:23:24,906 INFO  [main] zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:61181
sessionTimeout=120000 watcher=master:484800x0, quorum=localhost:61181, baseZNode=/ams-hbase-unsecure
{code}


Diffs
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  ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog221.java f5efde4

  ambari-server/src/main/resources/common-services/AMBARI_METRICS/0.1.0/configuration/ams-hbase-site.xml
12c1be9 
  ambari-server/src/test/java/org/apache/ambari/server/upgrade/UpgradeCatalog221Test.java
ec8beef 

Diff: https://reviews.apache.org/r/41994/diff/


Testing
-------

UpgradeCatalog test pass.


Thanks,

Sid Wagle


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