TestDebugSupport is flaky in TeamCity

Moved from GitHub dgraph/4560

Posted by martinmr:

What version of Dgraph are you using?

master

Have you tried reproducing the issue with the latest release?

yes

Steps to reproduce the issue (command/config used to run Dgraph).

Test is flaky. Example.

https://teamcity.dgraph.io/viewLog.html?buildId=39268&tab=buildResultsDiv&buildTypeId=Dgraph_CiDefaultTestCluster