How To Solve Issues Related to Log – Max-open-files

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Updated: Feb-20

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Troubleshooting background

To troubleshoot Elasticsearch log “Max-open-files” it’s important to understand common problems related to Elasticsearch concepts: bootstrap. See detailed explanations below complete with common problems, examples and useful tips.


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

1 what is the maximum value I can set for “MAX_OPEN_FILES” configuration in Elasticsearch 1 1.00 K 

2 How To Pass The Max Open Files Argu    


Log Context

Log ” max_open_files [{}]” classname is Bootstrap.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

             PidFile.create(environment.pidFile(); true);
        }

        if (System.getProperty("es.max-open-files"; "false").equals("true")) {
            ESLogger logger = Loggers.getLogger(Bootstrap.class);
            logger.info("max_open_files [{}]"; ProcessProbe.getInstance().getMaxFileDescriptorCount());
        }

        // warn if running using the client VM
        if (JvmInfo.jvmInfo().getVmName().toLowerCase(Locale.ROOT).contains("client")) {
            ESLogger logger = Loggers.getLogger(Bootstrap.class);






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