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https://issues.apache.org/jira/browse/HBASE-5058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13171481#comment-13171481
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Lars Hofhansl commented on HBASE-5058:
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Thanks for reviewing stack.
Re UndeclaredThrowableException. HBaseAdmin used to catch it, but it should
have never leaked up to HBaseAdmin. According to the documentation it is
"Thrown by a method invocation on a proxy instance...". I verified
experimentally that this exception is indeed thrown when I shutdown the cluster
and try to reuse the HConnection (or before the HBaseAdmin) instance. Maybe
that is another bug.
The 2nd part, yeah I think that was just dumb before. There are two levels of
retrying. HConnection already has a retry mechanism. That said, it seems that
for unmanaged connections (i.e. created by HBaseAdmin itself) the
HConnectionManager.HConnectionImplementation.masterChecked would not reset to
false. I was thinking about just removing that flag, and that in fact might be
a better option. Then every call to HConnection.getMaster would try again,
which is as it should be. Let me make a new patch with this.
> Allow HBaseAmin to use an existing connection
> ---------------------------------------------
>
> Key: HBASE-5058
> URL: https://issues.apache.org/jira/browse/HBASE-5058
> Project: HBase
> Issue Type: Sub-task
> Components: client
> Affects Versions: 0.94.0
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Priority: Minor
> Fix For: 0.94.0
>
> Attachments: 5058.txt
>
>
> What HBASE-4805 does for HTables, this should do for HBaseAdmin.
> Along with this the shared error handling and retrying between HBaseAdmin and
> HConnectionManager can also be improved. I'll attach a first pass patch soon.
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