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Posted to commits@cassandra.apache.org by "Laxmikant Upadhyay (JIRA)" <ji...@apache.org> on 2019/01/22 11:08:00 UTC
[jira] [Commented] (CASSANDRA-9881) Rows with negative-sized keys
can't be skipped by sstablescrub
[ https://issues.apache.org/jira/browse/CASSANDRA-9881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16748614#comment-16748614 ]
Laxmikant Upadhyay commented on CASSANDRA-9881:
-----------------------------------------------
I am also observing this issue on 3.11.2 . Sstables were corrupted as disk got full due to snapshots, and when i run nodetool scrub after deleting snapshots i get below WARN in infinite loop.
{code:java}
WARN [CompactionExecutor:2677] 2019-01-22 10:08:16,907 OutputHandler.java:52 - Row starting at position 24772608 is unreadable; skipping to next
WARN [CompactionExecutor:2677] 2019-01-22 10:08:16,908 OutputHandler.java:57 - Error reading row (stacktrace follows):
java.io.IOError: java.io.IOException: Unable to read row key from data file
at org.apache.cassandra.db.compaction.Scrubber.scrub(Scrubber.java:216) ~
{code}
> 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: Minor
> 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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