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https://issues.apache.org/jira/browse/KAFKA-6371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16297828#comment-16297828
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Maytee Chinavanichkit commented on KAFKA-6371:
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[~huxi_2b] Yes!
> FetchMetadata creates unneeded Strings on instantiation
> -------------------------------------------------------
>
> Key: KAFKA-6371
> URL: https://issues.apache.org/jira/browse/KAFKA-6371
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.0.1, 0.10.1.1, 0.10.2.1
> Reporter: Maytee Chinavanichkit
> Assignee: Maytee Chinavanichkit
> Priority: Minor
> Fix For: 0.10.0.2, 0.10.1.2, 0.10.2.2
>
>
> My colleague and I were taking a heap dump to investigate the memory usage of
> a broker. From the dump, we saw a number of object strings with the message
> {{onlyCommitted: <redacted>}} and {{partitionStatus: <redacted>]}}. Upon
> investigation, these objects were being instantiated when the
> {{FetchMetadata}} object is constructed. The toString method here is
> malformed and the last two lines are executed as a block instead of being
> concatenated.
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