Cannot send message; event loop is shutting down. – How to solve this Elasticsearch error

Cannot send message; event loop is shutting down. – How to solve this Elasticsearch error

Opster Team

July-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 that cause many errors.

This guide will help you check for common problems that cause the log ” Cannot send message; event loop is shutting down. ” 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: Node.

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 pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”Cannot send message; event loop is shutting down.”classname  is Netty4TcpChannel.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

@Override
  public void sendMessage(OutboundHandler.SendContext sendContext) {
  channel.writeAndFlush(sendContext; addPromise(sendContext; channel));
 
  if (channel.eventLoop().isShutdown()) {
  sendContext.onFailure(new TransportException("Cannot send message; event loop is shutting down."));
  }
  }
 
  public Channel getNettyChannel() {
  return channel;

 

Run the Check-Up to get a customized report like this:

Analyze your cluster