Exception while retrieving instance list from AWS API: – How to solve related issues

Exception while retrieving instance list from AWS API: – 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 ” Exception while retrieving instance list from AWS API: ” 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: cloud-aws, discovery, discovery-ec2, hosts and plugins.

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 “Exception while retrieving instance list from AWS API: {}” classname is AwsEc2UnicastHostsProvider.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             // NOTE: we don't filter by security group during the describe instances request for two reasons:
            // 1. differences in VPCs require different parameters during query (ID vs Name)
            // 2. We want to use two different strategies: (all security groups vs. any security groups)
            descInstances = SocketAccess.doPrivileged(() -> clientReference.client().describeInstances(buildDescribeInstancesRequest()));
        } catch (final AmazonClientException e) {
            logger.info("Exception while retrieving instance list from AWS API: {}"; e.getMessage());
            logger.debug("Full exception:"; e);
            return dynamicHosts;
        }

        logger.trace("building dynamic unicast discovery nodes...");




 

Run the Check-Up to get customized recommendations like this:

checklist Run Check-Up

error

Heavy merges detected in specific nodes

error-img

Description

A large number of small shards can slow down searches and cause cluster instability. Some indices have shards that are too small…

error-img

Recommendations Based on your specific ES deployment you should…

Based on your specific ES deployment you should…

1

X-PUT curl -H [a customized code snippet to resolve the issue]

 

 

 

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