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https://issues.apache.org/jira/browse/PHOENIX-4130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16344436#comment-16344436
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James Taylor commented on PHOENIX-4130:
---------------------------------------
Looks good, with one minor nit. Just remove the extra check you added here to
do nothing if the old/new state are DISABLE and the INDEX_DISABLE_TIMESTAMP is
the same. I remember a case where we want this to go through so that the cell
timestamp changes.
{code}
+ // potential race condition between client and rebuilder
+ // when transitioning from PENDING_DISABLE -> DISABLE.
Noop in that case
+ if (newState == PIndexState.DISABLE &&
Math.abs(curTimeStampVal) == Math.abs(newDisableTimeStamp)) {
+
builder.setReturnCode(MetaDataProtos.MutationCode.TABLE_ALREADY_EXISTS);
+
builder.setMutationTime(EnvironmentEdgeManager.currentTimeMillis());
+ done.run(builder.build());
+ return;
+ }
{code}
> Avoid server retries for mutable indexes
> ----------------------------------------
>
> Key: PHOENIX-4130
> URL: https://issues.apache.org/jira/browse/PHOENIX-4130
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Lars Hofhansl
> Assignee: Vincent Poon
> Priority: Major
> Fix For: 4.14.0
>
> Attachments: PHOENIX-4130.v1.master.patch,
> PHOENIX-4130.v2.master.patch, PHOENIX-4130.v3.master.patch,
> PHOENIX-4130.v4.master.patch, PHOENIX-4130.v5.master.patch,
> PHOENIX-4130.v6.master.patch
>
>
> Had some discussions with [~jamestaylor], [~samarthjain], and [~vincentpoon],
> during which I suggested that we can possibly eliminate retry loops happening
> at the server that cause the handler threads to be stuck potentially for
> quite a while (at least multiple seconds to ride over common scenarios like
> splits).
> Instead we can do the retries at the Phoenix client that.
> So:
> # The index updates are not retried on the server. (retries = 0)
> # A failed index update would set the failed index timestamp but leave the
> index enabled.
> # Now the handler thread is done, it throws an appropriate exception back to
> the client.
> # The Phoenix client can now retry. When those retries fail the index is
> disabled (if the policy dictates that) and throw the exception back to its
> caller.
> So no more waiting is needed on the server, handler threads are freed
> immediately.
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