PowerFlex 3.x eventlog.db file filling up and not rotating

Summary: PowerFlex versions 3.0.1.6, 3.5.1.4, and 3.6.0.2 and lower have a bug that causes the rotation mechanism of the eventlog.db file to not work at all, which causes a continuous increase in the file size. ...

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Symptoms

The file size gets too big over time, never rotates, and historical datafile never get deleted.
The /opt mount point gets filled up and when reaches 100% used capacity might cause an MDM service to crash. 

[root@test_largedb ~]# cd /opt/emc/scaleio/mdm/logs
[root@test_largedb logs]# ls -lrth
total 35G
-rw-------. 1 root root 0 Oct 5 2021 umt.0
-rw-r--r--. 1 root root 387 Oct 5 2021 emc-scaleio-mdm-install.log
-rw-------. 1 root root 2.1K Oct 6 2021 license.key
-rw-r--r--. 1 root root 32K Nov 22 2021 eventlog.db_2021_11_22_20_31_05_300
-rw-r--r--. 1 root root 59M Nov 23 2021 eventlog.db_2021_11_23_09_13_02_696
-rw-r--r--. 1 root root 8.9M Nov 23 2021 eventlog.db_2021_11_23_22_33_39_606
-rw-r--r--. 1 root root 24K Nov 23 2021 eventlog.db_2021_11_23_22_33_41_609
-rw-r--r--. 1 root root 17M Nov 26 2021 eventlog.db_2021_11_26_20_38_37_371
-rw-r--r--. 1 root root 12K Nov 26 2021 eventlog.db_2021_11_26_20_38_38_217
-rw-------. 1 root root 3.3M Feb 15 2022 volume_migration.0
-rw-------. 1 root root 51M Sep 24 01:05 trc.z.4
-rw-------. 1 root root 51M Sep 25 16:59 trc.z.3
-rw-------. 1 root root 51M Sep 27 09:02 trc.z.2
-rw-------. 1 root root 32K Sep 28 19:26 cmatrix_00.0
-rw-------. 1 root root 2.7M Sep 28 19:27 balance_00.0
-rw-------. 1 root root 189 Sep 28 19:37 signal.0
-rw-------. 1 root root 389 Sep 28 19:37 exp.0
-rw-------. 1 root root 2.6K Sep 28 19:37 trc.z.rescue.0
-rw-------. 1 root root 1.3K Sep 28 20:00 trc.0
-rw-r--r--. 1 root root 35G Sep 28 20:00 eventlog.db   <<<
-rw-------. 1 root root 51M Sep 30 05:46 trc.z.1
-rw-------. 1 root root 9.3M Oct 3 08:52 trc.z.0
[root@test_largedb logs]# df -kh /opt
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_data_os-lv_opt 40G 35G 5G 87.5% /opt   <<<

Cause

eventlog.db is the script handling the rotation mechanism of eventlog.db.
The script is written with Python version 2 syntax.
With operation systems where the default Python version is Python3, (e.g Red Hat 8, which runs only Python3), the script will always fail with a syntax error, which results in failing to rotate the eventlog.db file and it increases in size endlessly, until the service is terminated.

Resolution

Upgrade to a fixed version with Python compatibility issue resolved - PowerFlex versions 3.0.1.7, 3.5.1.5, and 3.6.0.3

Affected Products

PowerFlex rack, PowerFlex Appliance, PowerFlex custom node, PowerFlex Software
Article Properties
Article Number: 000205077
Article Type: Solution
Last Modified: 17 Feb 2025
Version:  4
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