EDR: Cbupgrade Process Reports Error 400 Cycle Detected

Products

• Carbon Black EDR (formerly Cb Response)

Issue/Introduction

After starting the cbupgrade process it appears to be stuck in a loop generating the following error

Request to http://127.0.0.1:8080/solr/cbmodules/select failed with error < 400 cycle detected

Environment

• EDR Server: All Supported Versions
• Linux: All Supported Versions

Cause

The above error is generated when the server is configured to use a proxy server. The call to 127.0.0.1 is not processed correctly 

Resolution

Add the following to the proxy configuration files 
 

/etc/profile.d/http_proxy.sh
export no_proxy=127.0.0.1,localhost

/etc/environment
export no_proxy=127.0.0.1,localhost

Additional Information

The configuration can also be tested with curl command the 

curl "http://127.0.0.1:8080/solr/#/cbalerts/query?q=*:*&q.op=OR&indent=true"

 If the proxy is not configured properly the result returned from the curl command will be similar to the error reported during cbupgrade