gocd: Agent Error occurred during loop NullPointerException: Cannot invoke "org.apache.http.Header.getValue()" because "md5Header" is null

Issue Type

• Bug Report

Summary

The GoCD Server inform that our two agents are idle but lot of task are pending waiting for an agent. The agent docker log of both ends with a serie of NullPointerException, more than twenty continuous errors of the fellow type:

` 2018-03-01 11:55:55,365 [stdout] - 2018-03-01 11:55:55,364 ERROR [loopThread] AgentController:91 - [Agent Loop] Error occurred during loop:

2018-03-01 11:55:55,365 [stdout] - java.lang.NullPointerException: null `

Environment

gocd-support.txt

Basic environment details

Go Server Version: 18.1.0 (5937-8a847b96ee8d38173f80178ed1285f0e53a970e0) JVM version: 1.8.0_151 OS Information: Linux 4.9.76-3.78.amzn1.x86_64 Usable space in artifacts repository: 2.72 GB Database schema version: 1801007 Pipelines Count: 3

Additional Environment Details

We are using the official docker images.