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From "Reid Chan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18837) HTableMultiplexer behavior during regions split
Date Fri, 22 Sep 2017 09:32:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16176168#comment-16176168
] 

Reid Chan commented on HBASE-18837:
-----------------------------------

{code}
if (!succ) {
		if (!resubmitFailedPut(ps, oldLoc)) {
			FlushWorker.this.getTotalFailedPutCount().incrementAndGet();
		}
	}
{code}
It potentially leads to a recursive call on {{resubmitFailedPut(ps, oldLoc)}} methods, as
long as this put gets failed caused by some unexpected situations, resulting in StackOverFlow
or OutOfMemory exception whichever comes first.

> HTableMultiplexer behavior during regions split
> -----------------------------------------------
>
>                 Key: HBASE-18837
>                 URL: https://issues.apache.org/jira/browse/HBASE-18837
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client
>    Affects Versions: 1.1.2
>            Reporter: chausson
>            Priority: Minor
>
> HTableMultiplexer class mentions following in the javadoc : "If any queue is full, the
HTableMultiplexer starts to drop the Put requests for that particular queue."
> This could be improved by replacing following code in HTableMultiplexer.resubmitFailedPut()
method :
> {code:title=HTableMultiplexer}
> try {
> 	succ = FlushWorker.this.getMultiplexer().put(tableName, failedPut, retryCount);
> } finally {
> 	FlushWorker.this.getRetryInQueue().decrementAndGet();
> 	if (!succ) {
> 		FlushWorker.this.getTotalFailedPutCount().incrementAndGet();
> 	}
> }
> {code}
> With : 
> {code}
> try {
> 	succ = FlushWorker.this.getMultiplexer().put(tableName, failedPut, retryCount);
> 	if (!succ) {
> 		if (!resubmitFailedPut(ps, oldLoc)) {
> 			FlushWorker.this.getTotalFailedPutCount().incrementAndGet();
> 		}
> 	}
> } finally {
> 	FlushWorker.this.getRetryInQueue().decrementAndGet();
> }
> {code}



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