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From "Fabien Rousseau (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-10829) cleanup + snapshot generates a lot of logs
Date Tue, 08 Dec 2015 09:37:11 GMT
Fabien Rousseau created CASSANDRA-10829:
-------------------------------------------

             Summary: cleanup + snapshot generates a lot of logs
                 Key: CASSANDRA-10829
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10829
             Project: Cassandra
          Issue Type: Bug
         Environment: 5 nodes on Cassandra 2.1.11 (on Debian)
            Reporter: Fabien Rousseau


One of our node generates a lot of cassandra logs (int the 10 MB/s) and CPU usage has increased
(by a factor 2-3).
This was most probably triggered by a "nodetool snapshot" while a cleanup was already running
on this node.

An example of those logs:
2015-12-08 09:15:17,794 INFO  [ValidationExecutor:689]ColumnFamilyStore.java:1923 Spinning
trying to capture released readers [...]
2015-12-08 09:15:17,794 INFO  [ValidationExecutor:689]ColumnFamilyStore.java:1924 Spinning
trying to capture all readers [...]
2015-12-08 09:15:17,795 INFO  [ValidationExecutor:689]ColumnFamilyStore.java:1923 Spinning
trying to capture released readers [...]
2015-12-08 09:15:17,795 INFO  [ValidationExecutor:689]ColumnFamilyStore.java:1924 Spinning
trying to capture all readers [...]
(I removed SSTableReader information because it's rather long... I can share it privately
if needed)
Note that the date has not been changed (only 1ms between logs)

It should not generate that gigantic amount of logs :)

This is probably linked to: https://issues.apache.org/jira/browse/CASSANDRA-9637



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