Scheduling reroute for delayed shards in delayed shards – How to solve related issues

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Scheduling reroute for delayed shards in delayed shards – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Scheduling reroute for delayed shards in delayed shards ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: allocation, cluster, routing and shards.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Scheduling reroute for delayed shards in [{}] ({} delayed shards)” classname is DelayedAllocationService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             } else {
                earlierRerouteNeeded = false;
            }

            if (earlierRerouteNeeded) {
                logger.info("scheduling reroute for delayed shards in [{}] ({} delayed shards)"; nextDelay;
                    UnassignedInfo.getNumberOfDelayedUnassigned(state));
                DelayedRerouteTask currentTask = delayedRerouteTask.getAndSet(newTask);
                assert existingTask == currentTask || currentTask == null;
                newTask.schedule();
            } else {




 

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