sambacc: add a retry loop to ctdb.monitor_cluster_meta_changes #130
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Add a loop that tries the `ctdb reloadnodes` command after an increasing delay. This is an attempt to fix a condition where ctdbd is apparently not ready to handle the `ctdb reloadnodes` command. In this case the command would be run, but fail and an exception would be raised in the monitor_cluster_meta_changes function would raise an exception. This would be caught by the command-level retry loop. However, this command-level retry loop will simply re-run monitor_cluster_meta_changes and this function now no longer has the same initial clustermeta state and has effectively "forgotten" that it needs to run reloadnodes. This new retry loop adds a level of error handling inside the monitor_cluster_meta_changes function so that we will retry with a bounded number of attempts. Signed-off-by: John Mulligan <[email protected]>
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Aug 18, 2024
| tries: int = 5, | ||
| ) -> None: | ||
| for idx in range(tries): | ||
| time.sleep(1 << idx) |
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Minor: have upper bound to sleep time. Something like time.sleep(min(1 << idx, 60)). Just in case someone naively increases tries to large value.
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Add a loop that tries the
ctdb reloadnodescommand after an increasing delay. This is an attempt to fix a condition where ctdbd is apparently not ready to handle thectdb reloadnodescommand. In this case the command would be run, but fail and an exception would be raised in the monitor_cluster_meta_changes function would raise an exception. This would be caught by the command-level retry loop. However, this command-level retry loop will simply re-run monitor_cluster_meta_changes and this function now no longer has the same initial clustermeta state and has effectively "forgotten" that it needs to run reloadnodes. This new retry loop adds a level of error handling inside the monitor_cluster_meta_changes function so that we will retry with a bounded number of attempts.