Briefly, this error occurs when Elasticsearch is unable to retrieve the segment counts after a force merge operation. This could be due to a network issue, a node failure, or a problem with the underlying storage. To resolve this issue, you can try restarting the Elasticsearch node, checking the network connectivity, or inspecting the health of your storage system. If the problem persists, you may need to reindex your data or restore from a backup.
This guide will help you check for common problems that cause the log ” [{}] retrieval of segment counts after force merge did not succeed; ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: merge, plugin.
Log Context
Log “[{}] retrieval of segment counts after force merge did not succeed; ” classname is SegmentCountStep.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
getClient().admin().indices().segments(new IndicesSegmentsRequest(index.getName());
ActionListener.wrap(response -> {
IndexSegments idxSegments = response.getIndices().get(index.getName());
if (idxSegments == null || (response.getShardFailures() != null && response.getShardFailures().length > 0)) {
final DefaultShardOperationFailedException[] failures = response.getShardFailures();
logger.info("[{}] retrieval of segment counts after force merge did not succeed; " +
"there were {} shard failures. failures: {}";
index.getName();
response.getFailedShards();
failures == null ? "n/a" : Strings.collectionToDelimitedString(Arrays.stream(failures)
.map(Strings::toString)
