Exception "java.io.UTFDataFormatException: malformed input around byte 55"
retrieving single column (but not slices)
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Key: CASSANDRA-954
URL: https://issues.apache.org/jira/browse/CASSANDRA-954
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 0.6
Environment: Ubuntu Jaunty on EC2 m1.large instance
Reporter: Aaron Lav
Using cassandra-cli, I get an exception on "get
PostingData.fields['146558416']['json']", but "get
PostingData.fields['146558416']" works fine and returns the expected data (a
single column named 'json'). The exception happens on both nodes of a two-node
cluster with RF set to 2.
This cluster was originally set up as a test and the problem data written with
0.5b2, so if there was a known bug in that release with these symptoms, please
point me to it and close this. I didn't notice it until after upgrading to
0.6rc1, but that could be coincidence.
grepping for 146558416 fields*-Index.db yields three posssible files, and only
one seems to be late enough for the column timestamp: fields-3355-*.db. That
was created by a compaction (under 0.5b2), according to the log: INFO
[COMPACTION-POOL:1] 2010-03-29 04:08:19,652 ColumnFamilyStore.java (line 944)
Compacted to /mnt2/cassandra/data/PostingData/fields-3355-Data.db.
17698781375/14295733792 bytes for 4048148 keys. Time: 943763ms.
I've changed my code to retrieve slices instead of specifying the column, which
is an adequate workaround.
Here's the full traceback:
ERROR [pool-1-thread-29] 2010-04-05 15:43:17,450 Cassandra.java (line 1197)
Internal error processing get
java.lang.RuntimeException: java.util.concurrent.ExecutionException:
java.io.UTFDataFormatException: malformed input around byte 55
at
org.apache.cassandra.service.StorageProxy.weakReadLocal(StorageProxy.java:542)
at
org.apache.cassandra.service.StorageProxy.readProtocol(StorageProxy.java:406)
at
org.apache.cassandra.thrift.CassandraServer.readColumnFamily(CassandraServer.java:101)
at
org.apache.cassandra.thrift.CassandraServer.multigetInternal(CassandraServer.java:309)
at
org.apache.cassandra.thrift.CassandraServer.get(CassandraServer.java:274)
at
org.apache.cassandra.thrift.Cassandra$Processor$get.process(Cassandra.java:1187)
at
org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:1125)
at
org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:253)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.util.concurrent.ExecutionException:
java.io.UTFDataFormatException: malformed input around byte 55
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
at java.util.concurrent.FutureTask.get(FutureTask.java:111)
at
org.apache.cassandra.service.StorageProxy.weakReadLocal(StorageProxy.java:538)
... 10 more
Caused by: java.io.UTFDataFormatException: malformed input around byte 55
at java.io.DataInputStream.readUTF(DataInputStream.java:656)
at
org.apache.cassandra.io.util.MappedFileDataInput.readUTF(MappedFileDataInput.java:431)
at
org.apache.cassandra.db.filter.SSTableNamesIterator.<init>(SSTableNamesIterator.java:55)
at
org.apache.cassandra.db.filter.NamesQueryFilter.getSSTableColumnIterator(NamesQueryFilter.java:69)
at
org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:830)
at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:750)
at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:719)
at org.apache.cassandra.db.Table.getRow(Table.java:381)
at
org.apache.cassandra.db.SliceByNamesReadCommand.getRow(SliceByNamesReadCommand.java:56)
at
org.apache.cassandra.service.StorageProxy$weakReadLocalCallable.call(StorageProxy.java:763)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
... 3 more
I'm often around on #cassandra as asl2, if anyone wants more info.
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