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From "Rudolf VanderLeeden (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-4644) Compaction error with Cassandra 1.1.4 and LCS
Date Tue, 11 Sep 2012 14:49:07 GMT
Rudolf VanderLeeden created CASSANDRA-4644:

             Summary: Compaction error with Cassandra 1.1.4 and LCS 
                 Key: CASSANDRA-4644
             Project: Cassandra
          Issue Type: Bug
          Components: Core
    Affects Versions: 1.1.4
         Environment: Cassandra 1.1.4, Ubuntu Lucid (2.6.32-346), Amazon EC2 m1.xlarge
            Reporter: Rudolf VanderLeeden

In our 1.1.4 testcluster of 3 nodes with RF=3, KS=1, and CF=5, we are getting an asserting
error when running 'nodetool compact highscores leaderboard'. This stops compactions on the
'leaderboard' CF summing up to 11835 pending compactions. This error is seen only one one

The SSTables have originally been created on a 1.1.2 cluster with STCS and then copied to
the testcluster also with 1.1.2. Repair, cleanup, compact were OK with STCS. Next, we changed
to LCS and did again repair, cleanup, compact with success. 

Then we started to use this LCS-based testcluster intensively and created lots of data and
also large keys with millions of columns. 

The assertion error in system.log :
 INFO [CompactionExecutor:8] 2012-09-11 14:20:45,043 (line 172)
Compacting large row highscores/leaderboard:4c422d64626331353166372d363464612d343235342d396130322d6535616365343337373532332d676c6f62616c2d30
(72589650 bytes) incrementally
ERROR [CompactionExecutor:8] 2012-09-11 14:20:50,336 (line 135)
Exception in thread Thread[CompactionExecutor:8,1,RMI Runtime]
        at org.apache.cassandra.db.compaction.LeveledManifest.promote(
        at org.apache.cassandra.db.compaction.LeveledCompactionStrategy.handleNotification(
        at org.apache.cassandra.db.DataTracker.notifySSTablesChanged(
        at org.apache.cassandra.db.DataTracker.replaceCompactedSSTables(
        at org.apache.cassandra.db.ColumnFamilyStore.replaceCompactedSSTables(
        at org.apache.cassandra.db.compaction.CompactionTask.execute(
        at org.apache.cassandra.db.compaction.LeveledCompactionTask.execute(
        at org.apache.cassandra.db.compaction.CompactionManager$6.runMayThrow(
        at java.util.concurrent.Executors$
        at java.util.concurrent.FutureTask$Sync.innerRun(
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(
        at java.util.concurrent.ThreadPoolExecutor$

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