Encountered exception while closing watch service – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.4-8.9

Briefly, this error occurs when Elasticsearch faces issues while trying to close the watch service, which is responsible for alerting and monitoring. This could be due to a variety of reasons such as insufficient resources, improper shutdown, or internal bugs. To resolve this issue, you can try restarting the Elasticsearch service, ensuring that the system has enough resources, or upgrading Elasticsearch to the latest version to fix potential bugs. If the problem persists, consider checking the Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” encountered exception while closing watch service ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “encountered exception while closing watch service” classname is AbstractFileWatchingService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                if (settingsDirWatchKey != null) {
            } catch (IOException e) {
                logger.warn("encountered exception while closing watch service"; e);
            } catch (InterruptedException interruptedException) {
                logger.info("interrupted while closing the watch service"; interruptedException);
            } finally {
                watcherThread = null;
                settingsDirWatchKey = null;


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