TestHCM failing sporadically on jenkins and always for me on an ubuntu machine
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Key: HBASE-4877
URL: https://issues.apache.org/jira/browse/HBASE-4877
Project: HBase
Issue Type: Bug
Reporter: stack
Fix For: 0.92.0
TestHCM takes 13 minutes for me on ubuntu and fails in testClosing. It runs
fine on a mac. The problem test is not testClosing as I thought originally,
its the test just previous, testConnectionUniqueness. testConnectionUniqueness
creates the maximum cached HConnections + 10 to verify each is unique if the
passed in Configuration has a unique hash. Problem comes when zk enforces its
default max from single host of 30 connections which is < (max cached + 10).
The max does not seem to be enforced on mac for me. The max connections runs
up to max of 31 -- zk max + 1 -- and works fine until we do the +10. On
ubuntu, when we hit the zk max of 30, we'll then go into a fail mode where we
cannot set up a zk session... each attempt takes a while. Test passes, it just
takes a while.
Only, the uniqueness test does not clean up after itself and so all sessions to
zk are outstanding so then when the subsequent testClosing runs, it can't set
up connections successfully so fails.
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