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Posted to reviews@iotdb.apache.org by "Sh-Zh-7 (via GitHub)" <gi...@apache.org> on 2024/03/21 05:42:05 UTC
[PR] Display 'UNKNOWN' in `SHOW FUNCTIONS` when CN accidentally drop DN's function. [iotdb]
Sh-Zh-7 opened a new pull request, #12208:
URL: https://github.com/apache/iotdb/pull/12208
When CNs execute `DROP FUNCTION`, the deletion will fail if one of DNs went down, but other DNs will still be affected, i.e., they will drop relevant information about this function.
After that, CNs consider that the to-be-deleted function still exists, so when it executes `SHOW FUNCTIONS`, it sends its information to DNs. It's DN's responsibility to add more detail on top of that.
However, from DN's perspective, the function is already dropped. So it will throw Null Pointer Exception.
In this PR, we display `UNKNOWN` if DN cannot find function, and thus avoids this issue.
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Re: [PR] Display 'UNKNOWN' in `SHOW FUNCTIONS` when CN accidentally drop DN's function. [iotdb]
Posted by "JackieTien97 (via GitHub)" <gi...@apache.org>.
JackieTien97 merged PR #12208:
URL: https://github.com/apache/iotdb/pull/12208
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