Exception while syncing before creating a snapshot – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch encounters an issue while trying to synchronize data before creating a snapshot. This could be due to a variety of reasons such as insufficient disk space, network connectivity issues, or problems with the underlying storage system. To resolve this issue, you can try the following: 1) Ensure there is enough disk space available for the snapshot. 2) Check the network connectivity between the Elasticsearch nodes. 3) Investigate the health and status of the underlying storage system. 4) Check the Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” exception while syncing before creating a snapshot ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, snapshot.

Log Context

Log “exception while syncing before creating a snapshot” class name is TranslogWriter.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 synchronized (this) {
 try {
 } catch (IOException e) {
 throw new TranslogException(shardId; "exception while syncing before creating a snapshot"; e);
 // If we reached this point; all of the buffered ops should have been flushed successfully.
 assert buffer == null;
 assert checkChannelPositionWhileHandlingException(totalOffset);
 assert totalOffset == lastSyncedCheckpoint.offset;