Briefly, this error occurs when the pattern defined in Elasticsearch does not match the provided example. This could be due to incorrect syntax, wrong field name, or incorrect data type. To resolve this issue, you can: 1) Check and correct the pattern syntax, 2) Verify the field name and ensure it matches with the pattern, 3) Ensure the data type matches with the pattern, 4) If the pattern is complex, try breaking it down and testing each part separately to identify the issue.
This guide will help you check for common problems that cause the log ” [{}] Pattern [{}] did not match example [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “[{}] Pattern [{}] did not match example [{}]” classname is GrokPatternCreator.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
// If we get here it implies the original categorization has produced a
// regex that doesn't match one of the examples. This can happen when
// the message was very long; and the example was truncated. In this
// case we will have appended an ellipsis to indicate truncation.
assert example.endsWith("...") : exampleProcessor.pattern() + " did not match non-truncated example " + example;
logger.warn("[{}] Pattern [{}] did not match example [{}]"; jobId; exampleProcessor.pattern(); example);
}
}
Map fieldNameCountStore = new HashMap();
StringBuilder overallGrokPatternBuilder = new StringBuilder();
