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From Jonas Borgström <jonas.borgst...@trioptima.com>
Subject Possible EOFException regression in 0.7.1
Date Tue, 15 Feb 2011 16:04:25 GMT
Hi all,

While testing the new 0.7.1 release I got the following exception:

ERROR [ReadStage:11] 2011-02-15 16:39:18,105
DebuggableThreadPoolExecutor.java (line 103) Error in ThreadPoolExecutor
java.io.IOError: java.io.EOFException
	at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.<init>(SSTableNamesIterator.java:75)
	at
org.apache.cassandra.db.filter.NamesQueryFilter.getSSTableColumnIterator(NamesQueryFilter.java:59)
	at
org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:80)
	at
org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1274)
	at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1166)
	at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1095)
	at org.apache.cassandra.db.Table.getRow(Table.java:384)
	at
org.apache.cassandra.db.SliceByNamesReadCommand.getRow(SliceByNamesReadCommand.java:60)
	at
org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:473)
	at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
	at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:636)
Caused by: java.io.EOFException
	at java.io.DataInputStream.readInt(DataInputStream.java:392)
	at
org.apache.cassandra.utils.BloomFilterSerializer.deserialize(BloomFilterSerializer.java:48)
	at
org.apache.cassandra.utils.BloomFilterSerializer.deserialize(BloomFilterSerializer.java:30)
	at
org.apache.cassandra.io.sstable.IndexHelper.defreezeBloomFilter(IndexHelper.java:108)
	at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.read(SSTableNamesIterator.java:106)
	at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.<init>(SSTableNamesIterator.java:71)
	... 12 more

I'm able reliably reproduce this using the following one node cluster:
- apache-cassandra-0.7.1-bin.tar.gz
- Fedora 14
- java version "1.6.0_20".
  OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)
- Default cassandra.yaml
- cassandra-env.sh: MAX_HEAP_SIZE="1G"; HEAP_NEWSIZE="200M"

cassandra-cli initialization:
- create keyspace foo;
- use foo;
- create column family datasets;

$ python dataset_check.py (attached)
Inserting row 0 of 10
Inserting row 1 of 10
Inserting row 2 of 10
Inserting row 3 of 10
Inserting row 4 of 10
Inserting row 5 of 10
Inserting row 6 of 10
Inserting row 7 of 10
Inserting row 8 of 10
Inserting row 9 of 10
Attempting to fetch key 0
Traceback (most recent call last):
...
pycassa.pool.MaximumRetryException: Retried 6 times

After this I have 6 EOFExceptions in system.log.
Running "get datasets[0]['name'];" using cassandra-cli also triggers the
same exception.
I've not been able to reproduce this with cassandra 0.7.0.

Regards,
Jonas



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