Sharvanath Pathak created CASSANDRA-10534:
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Summary: CompressionInfo not being fsynced on close
Key: CASSANDRA-10534
URL: https://issues.apache.org/jira/browse/CASSANDRA-10534
Project: Cassandra
Issue Type: Bug
Reporter: Sharvanath Pathak
I was seeing SSTable corruption due to a CompressionInfo.db file of size 0,
this happened multiple times in our testing with hard node reboots. After some
investigation it seems like these file is not being fsynced, and that can
potentially lead to data corruption.
I checked for fsync calls using strace, and found them happening for all but
the following components: CompressionInfo, TOC.txt and digest.sha1. All seem
tolerable but the CompressionInfo seem tolerable. Also a quick look through
the code and did not revealed any fsync calls. Moreover, I suspect the commit
4e95953f29d89a441dfe06d3f0393ed7dd8586df
(https://github.com/apache/cassandra/commit/4e95953f29d89a441dfe06d3f0393ed7dd8586df#diff-b7e48a1398e39a936c11d0397d5d1966R344)
to have caused the regression. Which removed the
{noformat}
getChannel().force(true);
{noformat}
from CompressionMetadata.Writer.close.
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