ISPN-7070

[wburns]

CacheNotifierImplInitialTransferDistTest.testIterationBeganAndSegmentNotComplete
random failures

• Make sure reads into listener collection are also synchronized
• Remove listener before replacing notifier that it registered with

https://issues.jboss.org/browse/ISPN-7070

[wburns]

I can't confirm 100% that this fixes it, but it seems the issue could have been caused by an unsynchronized read causing it not to see the updated collection size variable.

[pruivo]

I've run it locally for 1h and it didn't fail .I'm going to integrate it and see if it fails again in the future.

[danberindei]

Got another failure today:
https://www.dropbox.com/s/nsmz5k21dnk4h35/CacheNotifierImplInitialTransferDistTest_ISPN-7400_DistributionInfo_caching_20170302.log.gz?dl=0

[wburns]

The log seems similar to the previous one. Everything seems fine with the notifications. I will add a log message to the listener so we can see exactly which event is not being counted