[CASSANDRA-15284] AssertionError while scrubbing sstable

• Type: Bug
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Fix Version/s: 3.11.x, 4.0.x, 4.1.x
• Component/s: Feature/Compression
• Bug Category: Correctness - Unrecoverable Corruption / Loss
• Severity: Normal
• Complexity: Normal
• Discovered By: User Report
• Platform: OpenJDK, Linux
• Since Version: 3.11.4
• Assignee: Unassigned
• Reporter: Gianluigi Tiesi
• Created: 18/Aug/19 19:26
• Updated: 15/Sep/23 15:22

Description

I've got a damaged data file but while trying to run scrub (online or offline) I always get this

error:

 

-- StackTrace --
java.lang.AssertionError
        at org.apache.cassandra.io.compress.CompressionMetadata$Chunk.<init>(CompressionMetadata.java:474)
        at org.apache.cassandra.io.compress.CompressionMetadata.chunkFor(CompressionMetadata.java:239)
        at org.apache.cassandra.io.util.MmappedRegions.updateState(MmappedRegions.java:163)
        at org.apache.cassandra.io.util.MmappedRegions.<init>(MmappedRegions.java:73)
        at org.apache.cassandra.io.util.MmappedRegions.<init>(MmappedRegions.java:61)
        at org.apache.cassandra.io.util.MmappedRegions.map(MmappedRegions.java:104)
        at org.apache.cassandra.io.util.FileHandle$Builder.complete(FileHandle.java:362)
        at org.apache.cassandra.io.util.FileHandle$Builder.complete(FileHandle.java:331)
        at org.apache.cassandra.io.sstable.format.big.BigTableWriter.openFinal(BigTableWriter.java:336)
        at org.apache.cassandra.io.sstable.format.big.BigTableWriter.openFinalEarly(BigTableWriter.java:318)
        at org.apache.cassandra.io.sstable.SSTableRewriter.switchWriter(SSTableRewriter.java:322)
        at org.apache.cassandra.io.sstable.SSTableRewriter.doPrepare(SSTableRewriter.java:370)
        at org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:173)
        at org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.finish(Transactional.java:184)
        at org.apache.cassandra.io.sstable.SSTableRewriter.finish(SSTableRewriter.java:357)
        at org.apache.cassandra.db.compaction.Scrubber.scrub(Scrubber.java:291)
        at org.apache.cassandra.db.compaction.CompactionManager.scrubOne(CompactionManager.java:1010)
        at org.apache.cassandra.db.compaction.CompactionManager.access$200(CompactionManager.java:83)
        at org.apache.cassandra.db.compaction.CompactionManager$3.execute(CompactionManager.java:391)
        at org.apache.cassandra.db.compaction.CompactionManager$2.call(CompactionManager.java:312)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:81)
        at java.lang.Thread.run(Thread.java:748)

At the moment I've moved away the corrupted file, If you need more info fell free to ask
 

According to the source https://github.com/apache/cassandra/blob/cassandra-3.11/src/java/org/apache/cassandra/io/compress/CompressionMetadata.java#L474

looks like the requested chung length is <= 0