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From "Chris Lohfink (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-13346) Failed unregistering mbean during drop keyspace
Date Fri, 28 Apr 2017 14:08:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15988859#comment-15988859
] 

Chris Lohfink commented on CASSANDRA-13346:
-------------------------------------------

the "all" map is actually for metrics that have a global representation thats aggregated.
For example, theres a global sstables per read metric that aggregates all the individual table
and keyspace metrics so you can see the entire nodes sstables per read to see if any are high
instead of walking through entire table set to find out.

> Failed unregistering mbean during drop keyspace
> -----------------------------------------------
>
>                 Key: CASSANDRA-13346
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13346
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Materialized Views
>         Environment: Cassandra 3.9
>            Reporter: Gábor Auth
>            Assignee: Lerh Chuan Low
>            Priority: Minor
>              Labels: lhf
>             Fix For: 3.0.x, 3.11.x
>
>         Attachments: 13346-3.0.X.txt, 13346-3.X.txt
>
>
> All node throw exceptions about materialized views during drop keyspace:
> {code}
> WARN  [MigrationStage:1] 2017-03-16 16:54:25,016 ColumnFamilyStore.java:535 - Failed
unregistering mbean: org.apache.cassandra.db:type=Tables,keyspace=test20160810,table=unit_by_account
> java.lang.NullPointerException: null
>         at java.util.concurrent.ConcurrentHashMap.replaceNode(ConcurrentHashMap.java:1106)
~[na:1.8.0_121]
>         at java.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:1097)
~[na:1.8.0_121]
>         at java.util.concurrent.ConcurrentHashMap$KeySetView.remove(ConcurrentHashMap.java:4569)
~[na:1.8.0_121]
>         at org.apache.cassandra.metrics.TableMetrics.release(TableMetrics.java:712) ~[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.db.ColumnFamilyStore.unregisterMBean(ColumnFamilyStore.java:570)
[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.db.ColumnFamilyStore.invalidate(ColumnFamilyStore.java:527)
[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.db.ColumnFamilyStore.invalidate(ColumnFamilyStore.java:517)
[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.db.Keyspace.unloadCf(Keyspace.java:365) [apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.db.Keyspace.dropCf(Keyspace.java:358) [apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.config.Schema.dropView(Schema.java:744) [apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.schema.SchemaKeyspace.lambda$mergeSchema$373(SchemaKeyspace.java:1287)
[apache-cassandra-3.9.0.jar:3.9.0]
>         at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_121]
>         at org.apache.cassandra.schema.SchemaKeyspace.mergeSchema(SchemaKeyspace.java:1287)
[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.schema.SchemaKeyspace.mergeSchemaAndAnnounceVersion(SchemaKeyspace.java:1256)
[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.db.DefinitionsUpdateVerbHandler$1.runMayThrow(DefinitionsUpdateVerbHandler.java:51)
~[apache-cassandra-3.9.0.jar:3.9.0]
>         at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) ~[apache-cassandra-3.9.0.jar:3.9.0]
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_121]
>         at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_121]
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
~[na:1.8.0_121]
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
~[na:1.8.0_121]
>         at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_121]
> {code}



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