Failed to close searcher – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.3

Briefly, this error occurs when Elasticsearch is unable to close an open searcher due to issues like insufficient system resources, corrupted indices, or concurrent modifications. To resolve this, you can try increasing system resources, checking for and repairing corrupted indices, or ensuring that modifications are not happening concurrently. Additionally, restarting the Elasticsearch service may help in some cases.

This guide will help you check for common problems that cause the log ” failed to close searcher ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “failed to close searcher” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

    protected void closeNoLock(String reason; CountDownLatch closedLatch) {
        if (isClosed.compareAndSet(false; true)) {
            try {
                IOUtils.close(searcherManager; indexWriterLock; store::decRef);
            } catch (Exception ex) {
                logger.warn("failed to close searcher"; ex);
            } finally {


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?