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https://issues.apache.org/jira/browse/CASSANDRA-13346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985985#comment-15985985
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Lerh Chuan Low commented on CASSANDRA-13346:
--------------------------------------------
Hey Chris,
Thanks for answering. I'll try to fit dtests into my schedule and take a look
at how it works/how to write one.
With regards to your more recent comment, my impression is {{all}} is a hashmap
of metric names to their aliases.
{{allTableMetrics}} is a map of each metric to their set of metrics for each
Table ({{String, Set<String>}}, which is used in the aggregation metrics over
all Tables (e.g Readlatency key will have all the tables' read latency in its
Set of values). If we had it use a local one to store the ones we create for
the table, then we would need some way to aggregate over all known Tables.
Open to any suggestions though, as usual :)
> 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
> 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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