Safety gap millis should be non-negative – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.4-7.17

Briefly, this error occurs when the “safety_gap_millis” parameter in Elasticsearch is set to a negative value. This parameter is used to define the safety interval for certain operations and it should always be a non-negative number. To resolve this issue, you should check your Elasticsearch configuration or the specific request where this parameter is set, and ensure that “safety_gap_millis” is set to a valid non-negative value. If it’s not being explicitly set, you may need to investigate why it’s defaulting to a negative value.

This guide will help you check for common problems that cause the log ” safety_gap_millis should be non-negative ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “safety_gap_millis should be non-negative” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  Long safetyGapMillis = safetyGapMillisOption.value(options);  if (safetyGapMillis != null && safetyGapMillis < 0L) {
 throw new ElasticsearchException("safety_gap_millis should be non-negative");
 }  Integer parallelism = parallelismOption.value(options);
 if (parallelism != null && parallelism < 1) {
 throw new ElasticsearchException("parallelism should be at least 1");


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