Werk #18022: multipath: fix division by zero crash
| Component | Checks & agents | ||||||
| Title | multipath: fix division by zero crash | ||||||
| Date | May 8, 2025 | ||||||
| Level | Trivial Change | ||||||
| Class | Bug Fix | ||||||
| Compatibility | Incompatible - Manual interaction might be required | ||||||
| Checkmk versions & editions |
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The check plugin crashed with the error:
File "/omd/sites/hpc/lib/python3/cmk/base/plugins/agent_based/multipath.py", line 213, in check_multipath
num_active / num_paths * 100.0,
ZeroDivisionError (division by zero)
This issue occurred when no paths were found in the output of the multipath -l command.
The command’s output is influenced by the verbosity level,
which is defined in the multipath.conf file and typically defaults to level 2.
If this verbosity level is set to a lower value,
the command may not display all available paths, potentially also causing the check plugin to crash.
To address this, we now explicitly invoke multipath -l -v2 within the agent.
This werk is considered incompatible because the agent must be re-deployed to utilize the updated command.