Log Failed to lock all shards for index timed out after 30 seconds (version 6.8) – How To Solve Related Issues



Log Failed to lock all shards for index timed out after 30 seconds (version 6.8) – How To Solve Related Issues

Opster Team

Jan-20, Version: 1.7-8.0

 

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many log errors (free and no installation required)

 

This guide will help you check for common problems that cause the log “Failed to lock all shards for index timed out after 30 seconds (version 6.8)” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: cluster, index, indices, shards.


Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations. 

Log Context

Log “[{}] failed to lock all shards for index – timed out after 30 seconds” classname is IndicesClusterStateService.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                             // to the master. If we can't acquire the locks here immediately there might be a shard of this index still
                            // holding on to the lock due to a "currently canceled recovery" or so. The shard will delete itself BEFORE the
                            // lock is released so it's guaranteed to be deleted by the time we get the lock
                            indicesService.processPendingDeletes(index; indexSettings; new TimeValue(30; TimeUnit.MINUTES));
                        } catch (ShardLockObtainFailedException exc) {
                            logger.warn("[{}] failed to lock all shards for index - timed out after 30 seconds"; index);
                        } catch (InterruptedException e) {
                            logger.warn("[{}] failed to lock all shards for index - interrupted"; index);
                        }
                    }
                });









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