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https://issues.apache.org/jira/browse/HBASE-26864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Huaxiang Sun updated HBASE-26864:
---------------------------------
Description:
Changed the issue title and description for the scope of the work.
there is a bug in handling Rollback in SplitTableRegionProcedure.
[https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java#L304]
[https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java#L385]
{code:java}
In the state machine:
case SPLIT_TABLE_REGION_CLOSE_PARENT_REGION:
addChildProcedure(createUnassignProcedures(env));
// Comments from HX:
// createUnassignProcedures() can throw out IOException. If this
happens,
// it wont reach state SPLIT_TABLE_REGIONS_CHECK_CLOSED_REGION and no
parent regions
// is closed as all created UnassignProcedures are rolled back. If it
rolls back with
// state SPLIT_TABLE_REGION_CLOSE_PARENT_REGION, no need to call
openParentRegion(),
// otherwise, it will result in OpenRegionProcedure for an already
open region.
setNextState(SplitTableRegionState.SPLIT_TABLE_REGIONS_CHECK_CLOSED_REGIONS);
break;
In the rollback,
case SPLIT_TABLE_REGIONS_CHECK_CLOSED_REGIONS:
// Doing nothing, in SPLIT_TABLE_REGION_CLOSE_PARENT_REGION,
// we will bring parent region online
break;
case SPLIT_TABLE_REGION_CLOSE_PARENT_REGION:
// Comments from HX:
// OpenParentRegion() should not be called here as explained above.
openParentRegion(env);
break; {code}
was:
Changed the issue title and description for the scope of the work.
The reason
> SplitTableRegionProcedure, it calls openParentRegions() at a wrong state
> during rollback.
> -----------------------------------------------------------------------------------------
>
> Key: HBASE-26864
> URL: https://issues.apache.org/jira/browse/HBASE-26864
> Project: HBase
> Issue Type: Bug
> Components: Region Assignment
> Affects Versions: 2.4.10
> Reporter: Huaxiang Sun
> Assignee: Huaxiang Sun
> Priority: Major
>
> Changed the issue title and description for the scope of the work.
> there is a bug in handling Rollback in SplitTableRegionProcedure.
> [https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java#L304]
> [https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java#L385]
> {code:java}
> In the state machine:
> case SPLIT_TABLE_REGION_CLOSE_PARENT_REGION:
> addChildProcedure(createUnassignProcedures(env));
> // Comments from HX:
> // createUnassignProcedures() can throw out IOException. If this
> happens,
> // it wont reach state SPLIT_TABLE_REGIONS_CHECK_CLOSED_REGION and
> no parent regions
> // is closed as all created UnassignProcedures are rolled back. If
> it rolls back with
> // state SPLIT_TABLE_REGION_CLOSE_PARENT_REGION, no need to call
> openParentRegion(),
> // otherwise, it will result in OpenRegionProcedure for an already
> open region.
>
> setNextState(SplitTableRegionState.SPLIT_TABLE_REGIONS_CHECK_CLOSED_REGIONS);
> break;
> In the rollback,
> case SPLIT_TABLE_REGIONS_CHECK_CLOSED_REGIONS:
> // Doing nothing, in SPLIT_TABLE_REGION_CLOSE_PARENT_REGION,
> // we will bring parent region online
> break;
> case SPLIT_TABLE_REGION_CLOSE_PARENT_REGION:
> // Comments from HX:
> // OpenParentRegion() should not be called here as explained above.
> openParentRegion(env);
> break; {code}
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