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Posted to commits@cassandra.apache.org by "Russ Hatch (JIRA)" <ji...@apache.org> on 2014/12/08 16:40:13 UTC
[jira] [Resolved] (CASSANDRA-7775) Cassandra attempts to flush an
empty memtable into disk and fails
[ https://issues.apache.org/jira/browse/CASSANDRA-7775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Russ Hatch resolved CASSANDRA-7775.
-----------------------------------
Resolution: Cannot Reproduce
> Cassandra attempts to flush an empty memtable into disk and fails
> -----------------------------------------------------------------
>
> Key: CASSANDRA-7775
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7775
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: $ nodetool version
> ReleaseVersion: 2.0.6
> $ java -version
> java version "1.7.0_51"
> Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
> Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
> Reporter: Omri Bahumi
>
> I'm not sure what triggers this flush, but when it happens the following appears in our logs:
> {code}
> INFO [OptionalTasks:1] 2014-08-15 02:24:20,115 ColumnFamilyStore.java (line 785) Enqueuing flush of Memtable-app_recs_best_in_expr_prefix2@1219170646(0/0 serialized/live bytes, 0 ops)
> INFO [FlushWriter:34] 2014-08-15 02:24:20,116 Memtable.java (line 331) Writing Memtable-app_recs_best_in_expr_prefix2@1219170646(0/0 serialized/live bytes, 0 ops)
> ERROR [FlushWriter:34] 2014-08-15 02:24:20,127 CassandraDaemon.java (line 196) Exception in thread Thread[FlushWriter:34,5,main]
> java.lang.RuntimeException: Cannot get comparator 1 in org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.UTF8Type). This might due to a mismatch between the schema and the data read
> at org.apache.cassandra.db.marshal.CompositeType.getComparator(CompositeType.java:133)
> at org.apache.cassandra.db.marshal.CompositeType.getComparator(CompositeType.java:140)
> at org.apache.cassandra.db.marshal.AbstractCompositeType.compare(AbstractCompositeType.java:96)
> at org.apache.cassandra.db.marshal.AbstractCompositeType.compare(AbstractCompositeType.java:35)
> at org.apache.cassandra.db.RangeTombstone$Tracker$1.compare(RangeTombstone.java:125)
> at org.apache.cassandra.db.RangeTombstone$Tracker$1.compare(RangeTombstone.java:122)
> at java.util.TreeMap.compare(TreeMap.java:1188)
> at java.util.TreeMap$NavigableSubMap.<init>(TreeMap.java:1264)
> at java.util.TreeMap$AscendingSubMap.<init>(TreeMap.java:1699)
> at java.util.TreeMap.tailMap(TreeMap.java:905)
> at java.util.TreeSet.tailSet(TreeSet.java:350)
> at java.util.TreeSet.tailSet(TreeSet.java:383)
> at org.apache.cassandra.db.RangeTombstone$Tracker.update(RangeTombstone.java:203)
> at org.apache.cassandra.db.ColumnIndex$Builder.add(ColumnIndex.java:192)
> at org.apache.cassandra.db.ColumnIndex$Builder.build(ColumnIndex.java:138)
> at org.apache.cassandra.io.sstable.SSTableWriter.rawAppend(SSTableWriter.java:202)
> at org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:187)
> at org.apache.cassandra.db.Memtable$FlushRunnable.writeSortedContents(Memtable.java:365)
> at org.apache.cassandra.db.Memtable$FlushRunnable.runWith(Memtable.java:318)
> at org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
> at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:744)
> Caused by: java.lang.IndexOutOfBoundsException: index (1) must be less than size (1)
> at com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:306)
> at com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:285)
> at com.google.common.collect.SingletonImmutableList.get(SingletonImmutableList.java:45)
> at org.apache.cassandra.db.marshal.CompositeType.getComparator(CompositeType.java:124)
> ... 23 more
> {code}
> After this happens, the MemtablePostFlusher thread pool starts piling up.
> When trying to restart the cluster, a similar exception occurs when trying to replay the commit log.
> Our way of recovering from this is to delete all commit logs in the faulty node, start it and issue a repair.
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