Health check of took ms which is above the warn threshold of – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-1.1

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Briefly, this error occurs when the health check of a particular component in OpenSearch takes longer than the set warning threshold. This could be due to high load, insufficient resources, or network issues. To resolve this, you could increase the warning threshold if the current setting is too low. Alternatively, you could optimize your OpenSearch operations to reduce the load, allocate more resources if available, or troubleshoot potential network issues that might be causing delays.

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This guide will help you check for common problems that cause the log ” health check of [{}] took [{}ms] which is above the warn threshold of [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: threshold, monitor.

Log Context

Log “health check of [{}] took [{}ms] which is above the warn threshold of [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                            IOUtils.fsync(tempDataPath; false);
                        final long elapsedTime = currentTimeMillisSupplier.getAsLong() - executionStartTime;
                        if (elapsedTime > slowPathLoggingThreshold.millis()) {
                            logger.warn("health check of [{}] took [{}ms] which is above the warn threshold of [{}]";
                                path; elapsedTime; slowPathLoggingThreshold);
                } catch (Exception ex) {
                    logger.error(new ParameterizedMessage("health check of [{}] failed"; path); ex);


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