Detection of zombi postmaster is added (NodeStatus.Zombie)#394
Merged
dmitry-lipetsk merged 2 commits intoJul 12, 2026
Merged
Conversation
When we kill vanila-postmaster (10-18) on remote machine it becomes 'zombie'. pg_ctl says that node is started, by by fact it is not so. Now PostgresNode::status() check a postmaster process status (via /proc/<pid>/stat) and if 'Z' (zombie) is detected, this method returns the a status: NodeStatus.Zombie. Just for info: PG ENT does not have a such problem. Co-authored-by: Mark G. <mark@google.com>
We may catch a zombie during a node stop: "FAILED tests/test_testgres_common.py::TestTestgresCommon::test_pg_ctl_wait_option[local] - Exception: Unexpected node status: 3." It was on astralinux_1_7.
dmitry-lipetsk
added a commit
to dmitry-lipetsk/testgres
that referenced
this pull request
Jul 12, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
When we kill vanila-postmaster (10-18) on remote machine it becomes 'zombie'.
pg_ctl says that node is started, by by fact it is not so.
Now
PostgresNode::statuschecks a postmaster process status (via /proc/<pid>/stat) and if 'Z' (zombie) is detected, this method returns a status:NodeStatus.Zombie.Just for info: PG ENT does not have a such problem.