John Carrino created CASSANDRA-6008:
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Summary: Getting 'This should never happen' error at startup due
to sstables missing
Key: CASSANDRA-6008
URL: https://issues.apache.org/jira/browse/CASSANDRA-6008
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: John Carrino
Fix For: 2.0.1
Exception encountered during startup: "Unfinished compactions reference missing
sstables. This should never happen since compactions are marked finished before
we start removing the old sstables"
This happens when sstables that have been compacted away are removed, but they
still have entries in the system.compactions_in_progress table.
Normally this should not happen because the entries in
system.compactions_in_progress are deleted before the old sstables are deleted.
However at startup recovery time, old sstables are deleted (NOT BEFORE they are
removed from the compactions_in_progress table) and then after that is done it
does a truncate using SystemKeyspace.discardCompactionsInProgress
We ran into a case where the disk filled up and the node died and was bounced
and then failed to truncate this table on startup, and then got stuck hitting
this exception in ColumnFamilyStore.removeUnfinishedCompactionLeftovers.
Maybe on startup we can delete from this table incrementally as we clean stuff
up in the same way that compactions delete from this table before they delete
old sstables.
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