File corruption occurred on recovery but – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.2

Briefly, this error occurs when Elasticsearch encounters a corrupted file during the recovery process. This could be due to hardware issues, abrupt system shutdowns, or software bugs. To resolve this, you can try the following: 1) Restart the Elasticsearch node, which may trigger a new recovery process. 2) Restore the data from a recent backup. 3) If the corrupted shard is a replica, you can delete it and let Elasticsearch recreate it. 4) If the corruption is severe, you may need to rebuild the entire index. Always ensure your data is regularly backed up to prevent data loss.

This guide will help you check for common problems that cause the log ” File corruption occurred on recovery but ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: recovery, indices.

Log Context

Log “File corruption occurred on recovery but” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } catch (IOException ex) {
 throw targetException;
 // corruption has happened on the way to replica
 RemoteTransportException exception = new RemoteTransportException("File corruption occurred on recovery but " +
 "checksums are ok"; null);
 logger.warn(() -> new ParameterizedMessage(
 "{} Remote file corruption during finalization of recovery on node {}. local checksum OK";
 shard.shardId(); request.targetNode()); corruptIndexException);