scylla-jmx/dist/common/systemd/scylla-jmx.service
Takuya ASADA be8f1ac511 dist/common/systemd: set WorkingDirectory to get heap dump correctly
Currently scylla-jmx.service's PWD is "/", we get following error when
JVM trying to write heap dump on current directory:

Aug 17 05:52:15 localhost.localdomain scylla-jmx[3469]: Starting the JMX server
Aug 17 05:52:16 localhost.localdomain scylla-jmx[3469]: java.lang.OutOfMemoryError: Java heap space
Aug 17 05:52:16 localhost.localdomain scylla-jmx[3469]: Dumping heap to java_pid3469.hprof ...
Aug 17 05:52:16 localhost.localdomain scylla-jmx[3469]: Unable to create java_pid3469.hprof: Permission denied

To fix this, we need to specify WorkingDirectory on systemd unit.
2020-08-17 09:54:38 +03:00

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Desktop File

[Unit]
Description=Scylla JMX
Requires=scylla-server.service
After=scylla-server.service
[Service]
Type=simple
EnvironmentFile=/etc/sysconfig/scylla-jmx
User=scylla
Group=scylla
ExecStart=/opt/scylladb/jmx/scylla-jmx $SCYLLA_JMX_PORT $SCYLLA_API_PORT $SCYLLA_API_ADDR $SCYLLA_JMX_ADDR $SCYLLA_JMX_FILE $SCYLLA_JMX_LOCAL $SCYLLA_JMX_REMOTE $SCYLLA_JMX_DEBUG
KillMode=process
Restart=on-abnormal
Slice=scylla-helper.slice
WorkingDirectory=/var/lib/scylla
[Install]
WantedBy=multi-user.target