[
https://issues.apache.org/jira/browse/HBASE-7344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Hsieh resolved HBASE-7344.
-----------------------------------
Resolution: Duplicate
Assignee: Jonathan Hsieh
This was fixed in review phases of HBASE-7212. We added and used
ZKUtil#createWithParents(ZKW, znode, byte[] data) which atomically wrote the
data into the znode during creation (instead of creating an empty znode and
then adding data).
The older method exposed the possibility of reading an empty
SnapshotDescrpition. This is not possible anymore.
> subprocedure initialization fails with invalid znode data.
> ----------------------------------------------------------
>
> Key: HBASE-7344
> URL: https://issues.apache.org/jira/browse/HBASE-7344
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jonathan Hsieh
> Assignee: Jonathan Hsieh
>
> Sometimes snapshots subprocedures fail to start on RS because data read from
> ZK is bad.
> {code}
> 2012-12-13 07:22:55,238 ERROR
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs: Illegal argument
> exception
> java.lang.IllegalArgumentException: Could not read snapshot information from
> request.
> at
> org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager$SnapshotSubprocedureBuilder.buildSubprocedure(RegionServerSnapsh
> otManager.java:284)
> at
> org.apache.hadoop.hbase.procedure.ProcedureMember.createSubprocedure(ProcedureMember.java:98)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.startNewSubprocedure(ZKProcedureMemberRpcs.java:199)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.waitForNewProcedures(ZKProcedureMemberRpcs.java:167)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.access$1(ZKProcedureMemberRpcs.java:150)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs$1.nodeChildrenChanged(ZKProcedureMemberRpcs.java:106)
> at
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:303)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> 2012-12-13 07:22:55,239 ERROR
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs: Failed due to null
> subprocedure
> Local ForeignThreadException from null
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.startNewSubprocedure(ZKProcedureMemberRpcs.java:203)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.waitForNewProcedures(ZKProcedureMemberRpcs.java:167)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.access$1(ZKProcedureMemberRpcs.java:150)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs$1.nodeChildrenChanged(ZKProcedureMemberRpcs.java:106)
> at
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:303)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> Caused by: java.lang.IllegalArgumentException: Could not read snapshot
> information from request.
> at
> org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager$SnapshotSubprocedureBuilder.buildSubprocedure(RegionServerSnapshotManager.java:284)
> at
> org.apache.hadoop.hbase.procedure.ProcedureMember.createSubprocedure(ProcedureMember.java:98)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.startNewSubprocedure(ZKProcedureMemberRpcs.java:199)
> ... 6 more
> 2012-12-13 07:22:55,239 ERROR org.apache.zookeeper.ClientCnxn: Error while
> calling watcher
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.sendMemberAborted(ZKProcedureMemberRpcs.java:266)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.startNewSubprocedure(ZKProcedureMemberRpcs.java:203)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.waitForNewProcedures(ZKProcedureMemberRpcs.java:167)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.access$1(ZKProcedureMemberRpcs.java:150)
> at
> org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs$1.nodeChildrenChanged(ZKProcedureMemberRpcs.java:106)
> at
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:303)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> {code}
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