Failed with exception – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when a specific operation in OpenSearch fails due to an exception. The exception could be due to various reasons such as incorrect syntax, invalid data, or connectivity issues. To resolve this, you should first identify the operation that caused the error by checking the logs. Then, correct any syntax errors, validate the data being processed, or troubleshoot any network connectivity issues. If the error persists, consider restarting the OpenSearch service or, in extreme cases, reinstalling OpenSearch.

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This guide will help you check for common problems that cause the log ” {} failed with exception ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “{} failed with exception” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :"{} finished with response {}"; task.getId(); response);

    public void onFailure(Task task; Exception e) {
        logger.warn(() -> new ParameterizedMessage("{} failed with exception"; task.getId()); e);


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