Please report any error "java.lang.RuntimeException: Couldn’t get PID of Grakn. Received '"


We’ve seen several [reports] [from] [people] unable to start Grakn with the error “java.lang.RuntimeException: Couldn’t get PID of Grakn. Received '”.

Please report the issue here in this post following the bootup issue guideline.

Additionally, please write down the output of the following command: $ ps -ef | grep Grakn.

Best regards,



We managed to replicate the issue on a RHEL 7.0, and has provided a fix ready for the next release.

See issue:


I’m getting this error at bootup on a Ubuntu 16.04.2 LTS.
Is there something I can do in meantime until next version? Maybe a fresh build somewhere?


Hey @elymatos I will DM you in Slack,
if you want to test a snapshot version that has the fix for this issue
we can provide one