Jan Karlsson created CASSANDRA-9657:
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Summary: Hint table doing unnecessary compaction
Key: CASSANDRA-9657
URL: https://issues.apache.org/jira/browse/CASSANDRA-9657
Project: Cassandra
Issue Type: Bug
Environment: 2.1.7
Reporter: Jan Karlsson
Priority: Minor
I found some really strange behaviour. During the replay of a node I found this
in the log:
{code}INFO [CompactionExecutor:7] CompactionTask.java:271 Compacted 1 sstables
to
[/var/lib/cassandra/data/system/hints-2666e20573ef38b390fefecf96e8f0c7/system-hints-ka-120,].
452,150,727 bytes to 452,150,727 (~100% of original) in 267,588ms =
1.611449MB/s. 1 total partitions merged to 1. Partition merge counts were
{1:1, }{code}
This happened multiple times until the hint replay was completed and the
sstables were removed.
I tried to replicate this by just starting up a cluster in ccm and killing a
node for a few minutes. I got the same behaviour then.
{Code}
INFO [CompactionExecutor:2] CompactionTask.java:270 - Compacted 1 sstables to
[/home/ejankan/.ccm/hint/node3/data/system/hints-2666e20573ef38b390fefecf96e8f0c7/system-hints-ka-2,].
65,570 bytes to 65,570 (~100% of original) in 600ms = 0.104221MB/s. 1 total
partitions merged to 1. Partition merge counts were {1:1, }
{Code}
It seems weird to me that the file does not decrease in size.
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