Briefly, this error occurs when Elasticsearch’s Cross-Cluster Replication (CCR) feature is used and the auto-follow pattern is not correctly set up or missing. The auto-follow pattern is essential for automatically replicating indices from a leader to a follower cluster. To resolve this issue, ensure that the auto-follow pattern is correctly configured in the CCR settings. Check the syntax and the naming conventions. Also, verify that the leader cluster is accessible and the necessary permissions for replication are granted.
This guide will help you check for common problems that cause the log ” auto-follow pattern [{}] is missing ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “auto-follow pattern [{}] is missing” class name is TransportGetAutoFollowPatternAction.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
AutoFollowMetadata autoFollowMetadata = metadata.custom(AutoFollowMetadata.TYPE);
if (autoFollowMetadata == null) {
if (name == null) {
return Collections.emptyMap();
} else {
throw new ResourceNotFoundException("auto-follow pattern [{}] is missing"; name);
}
} if (name == null) {
return autoFollowMetadata.getPatterns();
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