Handle nil/empty cluster metadata #8078
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Handle case where a snapshot is made before cluster metadata is created. This fixes a bug where a server may have empty cluster metadata if it created and installed a Raft snapshot before a new cluster metadata ID is generated. This case is very unlikely to arise. Most likely reason is when upgrading from an old version slowly where servers may use snapshots before all servers upgrade. This happened for a user with a log line like: ``` 2020-05-21T15:21:56.996Z [ERROR] nomad.fsm: ClusterSetMetadata failed: error=""set cluster metadata failed: refusing to set new cluster id, previous: , new: <<redacted> ```
shoenig
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May 29, 2020
notnoop
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Jun 1, 2020
Handle nil/empty cluster metadata
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cherry-picked to 0.11.3 |
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I'm going to lock this pull request because it has been closed for 120 days ⏳. This helps our maintainers find and focus on the active contributions. |
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Handle case where a snapshot is made before cluster metadata is created.
This fixes a bug where a server may have empty cluster metadata if it
created and installed a Raft snapshot before a new cluster metadata ID is
generated.
This case is very unlikely to arise. Most likely reason is when
upgrading from an old version slowly where servers may use snapshots
before all servers upgrade. This happened for a user with a log line
like: