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https://issues.apache.org/jira/browse/HBASE-11094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14028749#comment-14028749
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Enis Soztutar commented on HBASE-11094:
---------------------------------------
>From my understanding of the patch, MasterFS has a volatile replay mode that
>can only change once all existing split log tasks are drained. Once that
>happens, all new tasks are created with this new mode.
- Do we still need the changes in open Region RPC? Can we use the region in zk
under replaying nodes be the canonical state?
- Is this relevant?
{code}
+++
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransactionOnCluster.java
+ cluster.startRegionServer();
{code}
- Is this relevant?
{code}
- private static final int slaves = 3; // also used for testing HTable pool
size
+ private static final int slaves = 5; // also used for testing HTable pool
size
{code}
- Wrong log name:
{code}
+ public void testGetPreviousRecoveryMode() throws Exception {
+ LOG.info("testNotAcquireTaskOfDifferentRecoveryMode");
{code}
> Distributed log replay is incompatible for rolling restarts
> -----------------------------------------------------------
>
> Key: HBASE-11094
> URL: https://issues.apache.org/jira/browse/HBASE-11094
> Project: HBase
> Issue Type: Sub-task
> Reporter: Enis Soztutar
> Assignee: Jeffrey Zhong
> Priority: Blocker
> Fix For: 0.99.0
>
> Attachments: hbase-11094-v2.patch, hbase-11094-v3.patch,
> hbase-11094-v4.patch, hbase-11094-v5.1.patch, hbase-11094-v5.patch,
> hbase-11094.patch
>
>
> 0.99.0 comes with dist log replay by default (HBASE-10888). However, reading
> the code and discussing this with Jeffrey, we realized that the dist log
> replay code is not compatible with rolling upgrades from 0.98.0 and 1.0.0.
> The issue is that, the region server looks at it own configuration to decide
> whether the region should be opened in replay mode or not. The open region
> RPC does not contain that info. So if dist log replay is enabled on master,
> the master will assign the region and schedule replay tasks. If the region is
> opened in a RS that does not have this conf enabled, then it will happily
> open the region in normal mode (not replay mode) causing possible (transient)
> data loss.
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