[jira] [Created] (KAFKA-5470) Replace -XX:+DisableExplicitGC with -XX:+ExplicitGCInvokesConcurrent in kafka-run-class

["Ismael Juma (JIRA)" <ji...@apache.org>]

Ismael Juma created KAFKA-5470:
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             Summary: Replace -XX:+DisableExplicitGC with -XX:+ExplicitGCInvokesConcurrent in kafka-run-class
                 Key: KAFKA-5470
                 URL: https://issues.apache.org/jira/browse/KAFKA-5470
             Project: Kafka
          Issue Type: Improvement
            Reporter: Ismael Juma
            Priority: Critical


This is important because Bits.reserveMemory calls System.gc() hoping to free native memory in order to avoid throwing an OutOfMemoryException. This call is currently a no-op due to -XX:+DisableExplicitGC.

It's worth mentioning that -XX:MaxDirectMemorySize can be used to increase the amount of native memory available for allocation of direct byte buffers.

Hongyuan Li pointed out the issue with the usage of -XX:+DisableExplicitGC in: https://issues.apache.org/jira/browse/KAFKA-5444?focusedCommentId=16054129&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16054129



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