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Posted to issues@hbase.apache.org by "Mubarak Seyed (Created) (JIRA)" <ji...@apache.org> on 2012/01/11 23:12:39 UTC
[jira] [Created] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
--------------------------------------------------------------------------------------------------
Key: HBASE-5181
URL: https://issues.apache.org/jira/browse/HBASE-5181
Project: HBase
Issue Type: Bug
Components: master
Affects Versions: 0.90.5, 0.92.0
Reporter: Mubarak Seyed
Priority: Minor
When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
{code}
2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
java.lang.ArrayIndexOutOfBoundsException: -256
at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
{code}
and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
{code}
@Override
public void readFields(DataInput in) throws IOException {
// the event type byte
eventType = EventType.values()[in.readShort()];
// the timestamp
stamp = in.readLong();
// the encoded name of the region being transitioned
regionName = Bytes.readByteArray(in);
// remaining fields are optional so prefixed with boolean
// the name of the regionserver sending the data
if (in.readBoolean()) {
byte [] versionedBytes = Bytes.readByteArray(in);
this.origin = ServerName.parseVersionedServerName(versionedBytes);
}
if (in.readBoolean()) {
this.payload = Bytes.readByteArray(in);
}
}
{code}
If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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[jira] [Commented] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Posted by "Mubarak Seyed (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184514#comment-13184514 ]
Mubarak Seyed commented on HBASE-5181:
--------------------------------------
Is there any suggestion on error message? How about
throw new IOException("There could be a stale region-in-transition in ZK." +
" The bad region is " + Bytes.toString(regionName) +
". Try deleting the region-in-transition using 'del /hbase/unassigned/"
+ Bytes.toString(regionName) + "' command over a ZK connection (in zkCli.sh)", ioe);
> Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-5181
> URL: https://issues.apache.org/jira/browse/HBASE-5181
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.90.5
> Reporter: Mubarak Seyed
> Assignee: Mubarak Seyed
> Priority: Minor
> Labels: noob
>
> When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
> {code}
> 2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
> 2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
> 2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.ArrayIndexOutOfBoundsException: -256
> at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
> at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> {code}
> and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
> {code}
> @Override
> public void readFields(DataInput in) throws IOException {
> // the event type byte
> eventType = EventType.values()[in.readShort()];
> // the timestamp
> stamp = in.readLong();
> // the encoded name of the region being transitioned
> regionName = Bytes.readByteArray(in);
> // remaining fields are optional so prefixed with boolean
> // the name of the regionserver sending the data
> if (in.readBoolean()) {
> byte [] versionedBytes = Bytes.readByteArray(in);
> this.origin = ServerName.parseVersionedServerName(versionedBytes);
> }
> if (in.readBoolean()) {
> this.payload = Bytes.readByteArray(in);
> }
> }
> {code}
> If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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[jira] [Commented] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Posted by "Zhihong Yu (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184551#comment-13184551 ]
Zhihong Yu commented on HBASE-5181:
-----------------------------------
The message is certainly detailed :-)
Please remember to replace '/hbase' with the value of zookeeper.znode.parent
> Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-5181
> URL: https://issues.apache.org/jira/browse/HBASE-5181
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.90.5
> Reporter: Mubarak Seyed
> Assignee: Mubarak Seyed
> Priority: Minor
> Labels: noob
>
> When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
> {code}
> 2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
> 2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
> 2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.ArrayIndexOutOfBoundsException: -256
> at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
> at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> {code}
> and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
> {code}
> @Override
> public void readFields(DataInput in) throws IOException {
> // the event type byte
> eventType = EventType.values()[in.readShort()];
> // the timestamp
> stamp = in.readLong();
> // the encoded name of the region being transitioned
> regionName = Bytes.readByteArray(in);
> // remaining fields are optional so prefixed with boolean
> // the name of the regionserver sending the data
> if (in.readBoolean()) {
> byte [] versionedBytes = Bytes.readByteArray(in);
> this.origin = ServerName.parseVersionedServerName(versionedBytes);
> }
> if (in.readBoolean()) {
> this.payload = Bytes.readByteArray(in);
> }
> }
> {code}
> If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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[jira] [Assigned] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Posted by "Zhihong Yu (Assigned) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhihong Yu reassigned HBASE-5181:
---------------------------------
Assignee: Mubarak Seyed
> Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-5181
> URL: https://issues.apache.org/jira/browse/HBASE-5181
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.90.5
> Reporter: Mubarak Seyed
> Assignee: Mubarak Seyed
> Priority: Minor
> Labels: noob
>
> When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
> {code}
> 2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
> 2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
> 2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.ArrayIndexOutOfBoundsException: -256
> at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
> at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> {code}
> and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
> {code}
> @Override
> public void readFields(DataInput in) throws IOException {
> // the event type byte
> eventType = EventType.values()[in.readShort()];
> // the timestamp
> stamp = in.readLong();
> // the encoded name of the region being transitioned
> regionName = Bytes.readByteArray(in);
> // remaining fields are optional so prefixed with boolean
> // the name of the regionserver sending the data
> if (in.readBoolean()) {
> byte [] versionedBytes = Bytes.readByteArray(in);
> this.origin = ServerName.parseVersionedServerName(versionedBytes);
> }
> if (in.readBoolean()) {
> this.payload = Bytes.readByteArray(in);
> }
> }
> {code}
> If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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[jira] [Updated] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Posted by "Mubarak Seyed (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mubarak Seyed updated HBASE-5181:
---------------------------------
Attachment: HBASE-5181-v1-trunk.patch
The attached file is a patch.
> Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-5181
> URL: https://issues.apache.org/jira/browse/HBASE-5181
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.90.5
> Reporter: Mubarak Seyed
> Assignee: Mubarak Seyed
> Priority: Minor
> Labels: noob
> Attachments: HBASE-5181-v1-trunk.patch
>
>
> When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
> {code}
> 2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
> 2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
> 2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.ArrayIndexOutOfBoundsException: -256
> at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
> at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> {code}
> and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
> {code}
> @Override
> public void readFields(DataInput in) throws IOException {
> // the event type byte
> eventType = EventType.values()[in.readShort()];
> // the timestamp
> stamp = in.readLong();
> // the encoded name of the region being transitioned
> regionName = Bytes.readByteArray(in);
> // remaining fields are optional so prefixed with boolean
> // the name of the regionserver sending the data
> if (in.readBoolean()) {
> byte [] versionedBytes = Bytes.readByteArray(in);
> this.origin = ServerName.parseVersionedServerName(versionedBytes);
> }
> if (in.readBoolean()) {
> this.payload = Bytes.readByteArray(in);
> }
> }
> {code}
> If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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[jira] [Commented] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Posted by "Mubarak Seyed (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184478#comment-13184478 ]
Mubarak Seyed commented on HBASE-5181:
--------------------------------------
Working on corporate approval to contribute this patch. Thanks.
> Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-5181
> URL: https://issues.apache.org/jira/browse/HBASE-5181
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.90.5
> Reporter: Mubarak Seyed
> Priority: Minor
> Labels: noob
>
> When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
> {code}
> 2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
> 2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
> 2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.ArrayIndexOutOfBoundsException: -256
> at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
> at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> {code}
> and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
> {code}
> @Override
> public void readFields(DataInput in) throws IOException {
> // the event type byte
> eventType = EventType.values()[in.readShort()];
> // the timestamp
> stamp = in.readLong();
> // the encoded name of the region being transitioned
> regionName = Bytes.readByteArray(in);
> // remaining fields are optional so prefixed with boolean
> // the name of the regionserver sending the data
> if (in.readBoolean()) {
> byte [] versionedBytes = Bytes.readByteArray(in);
> this.origin = ServerName.parseVersionedServerName(versionedBytes);
> }
> if (in.readBoolean()) {
> this.payload = Bytes.readByteArray(in);
> }
> }
> {code}
> If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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[jira] [Commented] (HBASE-5181) Improve error message when Master
fail-over happens and ZK unassigned node contains stale znode(s)
Posted by "Zhihong Yu (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-5181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184472#comment-13184472 ]
Zhihong Yu commented on HBASE-5181:
-----------------------------------
Thanks for the suggestion, Mubarak.
Do you want to attach a patch ?
> Improve error message when Master fail-over happens and ZK unassigned node contains stale znode(s)
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-5181
> URL: https://issues.apache.org/jira/browse/HBASE-5181
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0, 0.90.5
> Reporter: Mubarak Seyed
> Priority: Minor
> Labels: noob
>
> When master fail-over happens, if we have number of RITs under /hbase/unassigned and if we have stale znode(s) (encoded region names) under /hbase/unassigned, we are getting
> {code}
> 2011-12-30 10:27:35,623 INFO org.apache.hadoop.hbase.master.HMaster: Master startup proceeding: master failover
> 2011-12-30 10:27:36,002 INFO org.apache.hadoop.hbase.master.AssignmentManager: Failed-over master needs to process 1717 regions in transition
> 2011-12-30 10:27:36,004 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.ArrayIndexOutOfBoundsException: -256
> at org.apache.hadoop.hbase.executor.RegionTransitionData.readFields(RegionTransitionData.java:148)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:105)
> at org.apache.hadoop.hbase.util.Writables.getWritable(Writables.java:75)
> at org.apache.hadoop.hbase.executor.RegionTransitionData.fromBytes(RegionTransitionData.java:198)
> at org.apache.hadoop.hbase.zookeeper.ZKAssign.getData(ZKAssign.java:743)
> at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:262)
> at org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:223)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:401)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:283)
> {code}
> and there is no clue on how to clean-up the stale znode(s) from unassigned using zkCli.sh (del /hbase/unassigned/<bad region name>). It would be good if we include the bad region name in IOException from RegionTransitionData.readFields().
> {code}
> @Override
> public void readFields(DataInput in) throws IOException {
> // the event type byte
> eventType = EventType.values()[in.readShort()];
> // the timestamp
> stamp = in.readLong();
> // the encoded name of the region being transitioned
> regionName = Bytes.readByteArray(in);
> // remaining fields are optional so prefixed with boolean
> // the name of the regionserver sending the data
> if (in.readBoolean()) {
> byte [] versionedBytes = Bytes.readByteArray(in);
> this.origin = ServerName.parseVersionedServerName(versionedBytes);
> }
> if (in.readBoolean()) {
> this.payload = Bytes.readByteArray(in);
> }
> }
> {code}
> If the code execution has survived until regionName then we can include the regionName in IOException with error message to clean-up the stale znode(s) under /hbase/unassigned.
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