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huxihx commented on KAFKA-6371: ------------------------------- Seems it's already fixed in [KAFKA-5121|https://issues.apache.org/jira/browse/KAFKA-5121]? See commit: https://github.com/apache/kafka/commit/e71dce89c0da50f3eccc47d0fc050c92d5a99b88 Do you want to backport to 0.10.* codebase? > 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. -- This message was sent by Atlassian JIRA (v6.4.14#64029)