[CASSANDRA-5703] IndexSummary and empty keys

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Invalid
• Severity: Normal
• Assignee: Unassigned
• Reporter: Fabien Rousseau
• Created: 26/Jun/13 12:53
• Updated: 16/Apr/19 09:32
• Resolved: 26/Jun/13 14:41

Description

We just migrated one of our dev cluster to 1.2.6 and got this Exception for an SSTable after restarting nodes :

2013-06-26 11:18:46,316 [SSTableBatchOpen:1] ERROR CassandraDaemon - Exception in thread Thread[SSTableBatchOpen:1,5,main]
java.lang.AssertionError
at org.apache.cassandra.utils.ByteBufferUtil.readBytes(ByteBufferUtil.java:401)
at org.apache.cassandra.io.sstable.IndexSummary$IndexSummarySerializer.deserialize(IndexSummary.java:124)

The assertion :
https://github.com/apache/cassandra/blob/9851b73fc3bbaf61ec80b54c64483bcf56aaa396/src/java/org/apache/cassandra/utils/ByteBufferUtil.java#L401

should probably be "assert length >= 0;"

In a broader context, ByteBufferUtil.readBytes(...) could still be used to read 0 bytes without throwing an assertion

Note : This happens because the SSTable contains an empty rowkey. We're using StorageProxy directly, thus skipping validation, but it appears that other people hit this problem too : http://www.mail-archive.com/[e-mail]/msg30123.html

Also note that data contained in this SSTable is not available because the assertion error is not catched.