How To Solve Issues Related to Log – Unknown mlockall error

How To Solve Issues Related to Log – Unknown mlockall error

Updated: Feb-20

Elasticsearch Version: 1.7-8.0

Background

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To troubleshoot log “Unknown mlockall error” it’s important to understand a few problems related to Elasticsearch concepts bootstrap. See bellow important tips and explanations on these concepts

Log Context

Log”Unknown mlockall error” classname is JNANatives.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                 logger.warn("Unable to lock JVM memory (ENOMEM)."
                        + " This can result in part of the JVM being swapped out."
                        + " Increase RLIMIT_MEMLOCK (ulimit).");
            } else if (!System.getProperty("os.name").toLowerCase(Locale.ROOT).contains("mac")) {
                // OS X allows mlockall to be called; but always returns an error
                logger.warn("Unknown mlockall error " + errno);
            }
        }
    }

    static void tryVirtualLock() {




Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Elasticsearch fails to start

0.50 K 1

Unknown Mlockall Error 0  

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