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https://issues.apache.org/jira/browse/CASSANDRA-9881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17647675#comment-17647675
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Thomas Steinmaurer edited comment on CASSANDRA-9881 at 12/15/22 6:12 AM:
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Interesting, I'm also getting this with 3.11.14 while trying to scrub a single
Cassandra table, where it seems that a single physical SSTable on disk is
broken. Seems to be in an infinite loop with the same log line as shown above.
No progress according to "nodetool compactionstats" etc ...
{noformat}
WARN [CompactionExecutor:3252] 2022-12-14 19:29:32,206 UTC
OutputHandler.java:57 - Error reading partition (unreadable key) (stacktrace
follows):
java.io.IOError: java.io.IOException: Unable to read partition key from data
file
at org.apache.cassandra.db.compaction.Scrubber.scrub(Scrubber.java:222)
at
org.apache.cassandra.db.compaction.CompactionManager.scrubOne(CompactionManager.java:1052)
at
org.apache.cassandra.db.compaction.CompactionManager.access$200(CompactionManager.java:86)
at
org.apache.cassandra.db.compaction.CompactionManager$3.execute(CompactionManager.java:399)
at
org.apache.cassandra.db.compaction.CompactionManager$2.call(CompactionManager.java:319)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:84)
at java.lang.Thread.run(Thread.java:750)
Caused by: java.io.IOException: Unable to read partition key from data file
{noformat}
was (Author: tsteinmaurer):
Interesting, I'm also getting this with 3.11.14 while trying to scrub a single
Cassandra table, where it seems that a single physical SSTable on disk is
broken. Seems to be in an infinite loop with the same log line as shown above.
No progress according to "nodetool compactionstats" etc ...
> Rows with negative-sized keys can't be skipped by sstablescrub
> --------------------------------------------------------------
>
> Key: CASSANDRA-9881
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9881
> Project: Cassandra
> Issue Type: Bug
> Reporter: Brandon Williams
> Priority: Low
> Fix For: 2.1.x
>
>
> It is possible to have corruption in such a way that scrub (on or offline)
> can't skip the row, so you end up in a loop where this just keeps repeating:
> {noformat}
> WARNING: Row starting at position 2087453 is unreadable; skipping to next
> Reading row at 2087453
> row (unreadable key) is -1 bytes
> {noformat}
> The workaround is to just delete the problem sstable since you were going to
> have to repair anyway, but it would still be nice to salvage the rest of the
> sstable.
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