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Posted to dev@kafka.apache.org by "Jason Gustafson (JIRA)" <ji...@apache.org> on 2017/09/06 00:05:00 UTC
[jira] [Created] (KAFKA-5841) Open old index files with read-only
permission
Jason Gustafson created KAFKA-5841:
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Summary: Open old index files with read-only permission
Key: KAFKA-5841
URL: https://issues.apache.org/jira/browse/KAFKA-5841
Project: Kafka
Issue Type: Improvement
Reporter: Jason Gustafson
Since old index files do not change, we may as well drop the write permission needed when opening them. From the doc comments in {{OffsetIndex}}, it sounds like we may have had this implemented at one point:
{code}
* Index files can be opened in two ways: either as an empty, mutable index that allows appends or
* an immutable read-only index file that has previously been populated. The makeReadOnly method will turn a mutable file into an
* immutable one and truncate off any extra bytes. This is done when the index file is rolled over.
{code}
So we should either support this or (if there is good reason not to) update the comment.
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