[CASSANDRA-2528] NPE from PrecompactedRow

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 0.8.0 beta 2
• Severity: Normal
• Assignee: Jonathan Ellis
• Reporter: Jackson Chung

Authors

Jonathan Ellis

Reviewers

Jackson Chung

• Created: 21/Apr/11 17:55
• Updated: 16/Apr/19 09:33
• Resolved: 21/Apr/11 22:48

Description

received a NPE from trunk (0.8) on PrecompactedRow:

ERROR [CompactionExecutor:2] 2011-04-21 17:21:31,610 AbstractCassandraDaemon.java (line 112) Fatal exception in thread Thread[CompactionExecutor:2,1,main]
java.lang.NullPointerException
at org.apache.cassandra.io.PrecompactedRow.<init>(PrecompactedRow.java:86)
at org.apache.cassandra.io.CompactionIterator.getCompactedRow(CompactionIterator.java:167)
at org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:124)
at org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:44)
at org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingIterator.java:74)
at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140)
at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135)
at org.apache.commons.collections.iterators.FilterIterator.setNextObject(FilterIterator.java:183)
at org.apache.commons.collections.iterators.FilterIterator.hasNext(FilterIterator.java:94)
at org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:553)
at org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:146)
at org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:112)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)

size of data in /var/lib/cassandra is 11G on this, but there is also report that 1.7G also see the same.

data was previously populated from 0.7.4 cassandra

added debug logging, not sure how much this help (this is logged before the exception.)

INFO [CompactionExecutor:2] 2011-04-21 17:21:31,588 CompactionManager.java (line 534) Compacting Major: [SSTableReader(path='/var/lib/cassandra/data/cfs/inode.path-f-10-Data.db'), SSTableReader(path='/var/lib/cassandra/data/cfs/inode.path-f-7-Data.db'), SSTableReader(path='/var/lib/cassandra/data/cfs/inode.path-f-6-Data.db'), SSTableReader(path='/var/lib/cassandra/data/cfs/inode.path-f-8-Data.db'), SSTableReader(path='/var/lib/cassandra/data/cfs/inode.path-f-9-Data.db')]
DEBUG [CompactionExecutor:2] 2011-04-21 17:21:31,588 SSTableReader.java (line 132) index size for bloom filter calc for file : /var/lib/cassandra/data/cfs/inode.path-f-10-Data.db : 256
DEBUG [CompactionExecutor:2] 2011-04-21 17:21:31,588 SSTableReader.java (line 132) index size for bloom filter calc for file : /var/lib/cassandra/data/cfs/inode.path-f-7-Data.db : 512
DEBUG [CompactionExecutor:2] 2011-04-21 17:21:31,588 SSTableReader.java (line 132) index size for bloom filter calc for file : /var/lib/cassandra/data/cfs/inode.path-f-6-Data.db : 768
DEBUG [CompactionExecutor:2] 2011-04-21 17:21:31,589 SSTableReader.java (line 132) index size for bloom filter calc for file : /var/lib/cassandra/data/cfs/inode.path-f-8-Data.db : 1024
DEBUG [CompactionExecutor:2] 2011-04-21 17:21:31,589 SSTableReader.java (line 132) index size for bloom filter calc for file : /var/lib/cassandra/data/cfs/inode.path-f-9-Data.db : 1280
INFO [CompactionExecutor:2] 2011-04-21 17:21:31,609 CompactionIterator.java (line 185) Major@1181554512(cfs, inode.path, 523/10895) now compacting at 16777 bytes/ms.