[ https://issues.apache.org/jira/browse/CASSANDRA-6841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Benedict reassigned CASSANDRA-6841: ----------------------------------- Assignee: Benedict > ConcurrentModificationException in commit-log-writer after local schema reset > ----------------------------------------------------------------------------- > > Key: CASSANDRA-6841 > URL: https://issues.apache.org/jira/browse/CASSANDRA-6841 > Project: Cassandra > Issue Type: Bug > Environment: Linux 3.2.0 (Debian Wheezy) Cassandra 2.0.6, Oracle JVM > 1.7.0_51 > Almost default cassandra.yaml (IPs and cluster name changed) > This is the 2nd node in a 2-node ring. It has ~2500 keyspaces and very low > traffic. (Only new keyspaces see reads and writes.) > Reporter: Pas > Assignee: Benedict > Priority: Minor > > {code} > INFO [RMI TCP Connection(38)-192.168.36.171] 2014-03-12 11:37:54,013 > MigrationManager.java (line 329) Starting local schema reset... > INFO [RMI TCP Connection(38)-192.168.36.171] 2014-03-12 11:37:54,016 > ColumnFamilyStore.java (line 785) Enqueuing flush of > Memtable-local@394448776(114/1140 serialized/live bytes, 3 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,016 Memtable.java (line 331) > Writing Memtable-local@394448776(114/1140 serialized/live bytes, 3 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,182 Memtable.java (line 371) > Completed flushing > /var/lib/cassandra/data/system/local/system-local-jb-398-Data.db (145 bytes) > for commitlog position ReplayPosition(segmentId=1394620057452, > position=33159822) > INFO [RMI TCP Connection(38)-192.168.36.171] 2014-03-12 11:37:54,185 > ColumnFamilyStore.java (line 785) Enqueuing flush of > Memtable-local@1087210140(62/620 serialized/live bytes, 1 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,185 Memtable.java (line 331) > Writing Memtable-local@1087210140(62/620 serialized/live bytes, 1 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,357 Memtable.java (line 371) > Completed flushing > /var/lib/cassandra/data/system/local/system-local-jb-399-Data.db (96 bytes) > for commitlog position ReplayPosition(segmentId=1394620057452, > position=33159959) > INFO [RMI TCP Connection(38)-192.168.36.171] 2014-03-12 11:37:54,361 > ColumnFamilyStore.java (line 785) Enqueuing flush of > Memtable-local@768887091(62/620 serialized/live bytes, 1 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,361 Memtable.java (line 331) > Writing Memtable-local@768887091(62/620 serialized/live bytes, 1 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,516 Memtable.java (line 371) > Completed flushing > /var/lib/cassandra/data/system/local/system-local-jb-400-Data.db (96 bytes) > for commitlog position ReplayPosition(segmentId=1394620057452, > position=33160096) > INFO [CompactionExecutor:38] 2014-03-12 11:37:54,517 CompactionTask.java > (line 115) Compacting > [SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-jb-398-Data.db'), > > SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-jb-400-Data.db'), > > SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-jb-399-Data.db'), > > SSTableReader(path='/var/lib/cassandra/data/system/local/system-local-jb-397-Data.db')] > INFO [RMI TCP Connection(38)-192.168.36.171] 2014-03-12 11:37:54,519 > ColumnFamilyStore.java (line 785) Enqueuing flush of > Memtable-local@271993477(62/620 serialized/live bytes, 1 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,519 Memtable.java (line 331) > Writing Memtable-local@271993477(62/620 serialized/live bytes, 1 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:54,794 Memtable.java (line 371) > Completed flushing > /var/lib/cassandra/data/system/local/system-local-jb-401-Data.db (96 bytes) > for commitlog position ReplayPosition(segmentId=1394620057452, > position=33160233) > INFO [RMI TCP Connection(38)-192.168.36.171] 2014-03-12 11:37:54,799 > MigrationManager.java (line 357) Local schema reset is complete. > INFO [CompactionExecutor:38] 2014-03-12 11:37:54,848 CompactionTask.java > (line 275) Compacted 4 sstables to > [/var/lib/cassandra/data/system/local/system-local-jb-402,]. 6,099 bytes to > 5,821 (~95% of original) in 330ms = 0.016822MB/s. 4 total partitions merged > to 1. Partition merge counts were {4:1, } > INFO [OptionalTasks:1] 2014-03-12 11:37:55,110 ColumnFamilyStore.java (line > 785) Enqueuing flush of > Memtable-schema_columnfamilies@106276050(181506/509164 serialized/live bytes, > 3276 ops) > INFO [FlushWriter:6] 2014-03-12 11:37:55,110 Memtable.java (line 331) > Writing Memtable-schema_columnfamilies@106276050(181506/509164 > serialized/live bytes, 3276 ops) > INFO [OptionalTasks:1] 2014-03-12 11:37:55,110 ColumnFamilyStore.java (line > 785) Enqueuing flush of Memtable-schema_columns@252242773(185191/630698 > serialized/live bytes, 3614 ops) > ERROR [COMMIT-LOG-WRITER] 2014-03-12 11:37:55,111 CassandraDaemon.java (line > 196) Exception in thread Thread[COMMIT-LOG-WRITER,5,main] > java.util.ConcurrentModificationException > at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926) > at java.util.HashMap$KeyIterator.next(HashMap.java:960) > at > org.apache.cassandra.db.commitlog.CommitLogAllocator.flushOldestKeyspaces(CommitLogAllocator.java:309) > at > org.apache.cassandra.db.commitlog.CommitLogAllocator.fetchSegment(CommitLogAllocator.java:147) > at > org.apache.cassandra.db.commitlog.CommitLog.activateNextSegment(CommitLog.java:299) > at > org.apache.cassandra.db.commitlog.CommitLog.access$100(CommitLog.java:49) > at > org.apache.cassandra.db.commitlog.CommitLog$LogRecordAdder.run(CommitLog.java:350) > at > org.apache.cassandra.db.commitlog.PeriodicCommitLogExecutorService$1.runMayThrow(PeriodicCommitLogExecutorService.java:51) > at > org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) > at java.lang.Thread.run(Thread.java:744) > {code} -- This message was sent by Atlassian JIRA (v6.2#6252)