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https://issues.apache.org/jira/browse/HBASE-20095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16388138#comment-16388138
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Reid Chan commented on HBASE-20095:
-----------------------------------

bq. the second one will return true
second one will return false, since first one already updated the new size, the 
snippet,
{code}
int newSize = calculatePoolSize(conf.get(CHORE_POOL_SIZE, 
DEFAULT_CHORE_POOL_SIZE));
if (newSize == size) {
  // the second one will enter this branch.
  LOG.trace("Size from configuration is same as previous={}, no need to 
update.", newSize);
  return false;
}
size = newSize; // first one should update this size.
{code}

> Redesign single instance pool in CleanerChore
> ---------------------------------------------
>
>                 Key: HBASE-20095
>                 URL: https://issues.apache.org/jira/browse/HBASE-20095
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Reid Chan
>            Assignee: Reid Chan
>            Priority: Critical
>         Attachments: HBASE-20095.master.001.patch, 
> HBASE-20095.master.002.patch, HBASE-20095.master.003.patch, 
> HBASE-20095.master.004.patch, HBASE-20095.master.005.patch
>
>




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