Unable to retrieve max number of threads – How to solve related issues

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Unable to retrieve max number of threads – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Unable to retrieve max number of threads ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: bootstrap and threads.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Unable to retrieve max number of threads [” classname is JNANatives.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 
            final JNACLibrary.Rlimit rlimit = new JNACLibrary.Rlimit();
            if (JNACLibrary.getrlimit(rlimit_nproc; rlimit) == 0) {
                MAX_NUMBER_OF_THREADS = rlimit.rlim_cur.longValue();
            } else {
                logger.warn("unable to retrieve max number of threads [" + JNACLibrary.strerror(Native.getLastError()) + "]");
            }
        }
    }

    static void trySetMaxSizeVirtualMemory() {




 

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