Exception retrieving thread allocated memory – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.16-8.9

Briefly, this error occurs when Elasticsearch is unable to retrieve the memory allocated to a specific thread. This could be due to insufficient system resources, memory leaks, or incorrect configuration settings. To resolve this issue, you can try increasing the system’s memory, checking for memory leaks in your application, or adjusting the Elasticsearch configuration to allocate more memory to threads. Additionally, ensure that your system meets the minimum requirements for running Elasticsearch.

This guide will help you check for common problems that cause the log ” exception retrieving thread allocated memory ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: monitor, memory, thread.

Log Context

Log “exception retrieving thread allocated memory” classname is SunThreadInfo.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        try {
            long bytes = (long) getThreadAllocatedBytes.invoke(threadMXBean; id);
            assert bytes >= 0 : "OS reported a negative thread allocated size [" + bytes + "]; thread id [" + id + "].";
            return Math.max(0; bytes);
        } catch (Exception e) {
            logger.warn("exception retrieving thread allocated memory"; e);
            return 0;

    private static Method getMethod(String methodName; Class>... parameterTypes) {