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https://issues.apache.org/jira/browse/HBASE-4742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144895#comment-13144895
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Ted Yu commented on HBASE-4742:
-------------------------------
I don't see ProcessServerShutdown.java in 0.90 or TRUNK. So I assume it is from
0.89 branch.
I am not familiar with 0.89 branch. So my discussion below is tailored toward
0.92/TRUNK.
>From Liyin:
bq. instead of distribute log splitting for each dead server as a separate
thread.
I agree with the above statement.
In TRUNK, the method Liyin mentioned:
{code}
public void splitLog(final List<ServerName> serverNames) throws IOException {
{code}
translates server names to log paths and uses the following to split the paths:
{code}
splitLogSize = splitLogManager.splitLogDistributed(logDirs);
{code}
We can introduce a short interval for master to group the malfunctioning region
servers so that the above splitLog() API can be used.
If region servers go down with non-trivial interval in between, it is not
obvious how the above splitLog() API can be used.
> Split dead server's log in parallel
> -----------------------------------
>
> Key: HBASE-4742
> URL: https://issues.apache.org/jira/browse/HBASE-4742
> Project: HBase
> Issue Type: Improvement
> Reporter: Liyin Tang
> Assignee: Liyin Tang
> Attachments: D237.1.patch, D237.2.patch, D237.3.patch, D237.4.patch
>
>
> When one region server goes down, the master will shutdown the region server
> and split its log.
> However, splitting log is a blocking call and it would take some time.
> If more than one region server go down, the master will split its log one by
> one, which is not efficient.
> Since we have the distributed log split, we could split these logs from the
> dead servers in parallel.
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