Error processing watched file – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.8-8.9

Briefly, this error occurs when Elasticsearch encounters issues while processing a file that is being watched, possibly due to incorrect file permissions, corrupted file, or file format issues. To resolve this, you can check the file permissions and ensure Elasticsearch has the necessary access. If the file is corrupted, restore it from a backup. If the error persists, check the file format and ensure it’s compatible with Elasticsearch. Also, check the Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” Error processing watched file: ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “Error processing watched file: ” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            for (var listener : eventListeners) {
        } catch (IOException | ExecutionException e) {
            logger.error(() -> "Error processing watched file: " + watchedFile(); e);

    // package private for testing
    long retryDelayMillis(int failedCount) {


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