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https://issues.apache.org/jira/browse/CASSANDRA-20457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Kamyshnikov updated CASSANDRA-20457:
-----------------------------------------
Test and Documentation Plan:
New env vars are introduced:
CASSANDRA_HEAPDUMP_CLEAN:
1 - clean (default)
otherwise - do not clean
CASSANDRA_HEAPDUMP_KEEP_LAST_N_FILES
-1 - no heap dump files will be removed
0 - all heap dump files will be removed
N > 0 - up to N most recent files will be kept
default: 2
CASSANDRA_HEAPDUMP_KEEP_FIRST_N_FILES
-1 - no heap dump files will be removed
0 - all heap dump files will be removed
N > 0 - up to N least recent files will be kept
default: 1
Currently, only 100 heap dump files are being searched for, therefore having
CASSANDRA_HEAPDUMP_KEEP_LAST_N_FILES and CASSANDRA_HEAPDUMP_KEEP_FIRST_N_FILES
greater than 100 makes no sense.
tested on Ubuntu and Mac with fake hprof files created under the log dir using
for i in $(seq 1 1000); do echo 1 > "./logs/cassandra-$i-pid$i.hprof"; sleep
0.01; done;
./bin/cassandra
./bin/cassandra -H ./x.hprof
ls -1 ./logs | wc -l
> Limit number of OOM heap dumps to avoid full disk issue
> --------------------------------------------------------
>
> Key: CASSANDRA-20457
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20457
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Scripts
> Reporter: Dmitry Konstantinov
> Assignee: Igor Kamyshnikov
> Priority: Normal
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We can add the following protective logic to our startup scripts for
> Cassandra:
> * check the directory is used for heap dumps
> * if the number of existing heap dumps more than a threshold configured in an
> env variable then remove the oldest one
> It allows to avoid a case when we have a periodic OOM due to some issue and
> eventually kill ourselves due to lack of disk space consumed by heap dumps.
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