How To Solve Issues Related to Log – Fatal error in thread ; exiting

How To Solve Issues Related to Log – Fatal error in thread ; exiting

Updated: Jan-20

Elasticsearch Version: 1.7-8.0


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To troubleshoot log “Fatal error in thread ; exiting” it’s important to understand a few problems related to Elasticsearch concepts bootstrap, handler, thread. See bellow important tips and explanations on these concepts

Log Context

Log”Fatal error in thread [{}]; exiting” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

     static boolean isFatalUncaught(Throwable e) {
        return e instanceof Error;

    void onFatalUncaught(final String threadName; final Throwable t) {
        logger.error(() -> new ParameterizedMessage("fatal error in thread [{}]; exiting"; threadName); t);

    void onNonFatalUncaught(final String threadName; final Throwable t) {
        logger.warn(() -> new ParameterizedMessage("uncaught exception in thread [{}]"; threadName); t);

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 Elastic Search-Java.lang.OutOfMemoryError

0.97 K 

My Elasticsearch Fatal Error In Thr  

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