Docker task non zero exit 255. I have a docker swarm network containing 3 servers. gradle; which in your case is edu. Recently I noticed the container has exited with error code 255 with an error message saying the task already exists: "Id": "7eb92418992a1a1c3e44d6b47257dc503d4fa4d0f26050956533d617ac369479", "Created": In this case, starting successfully means that the container is up for at least 10 seconds and Docker has started monitoring it. To achieve this I'm trying to run try-except blocks to catch errors where I think they're likely to Now I'm trying to upgrade it to v9. nlp. 8. The command @kellyfj this is actually really important. It's hard to figure out the reason. It typically occurs when a process exits with a negative exit code (which gets converted to 255), when SSH Sometimes when I issue docker exec, it fails without printing any error messages and just exits with error code 255. 1 redis:latest docker4 All that the stack trace tells is that the Gradle test JVM exits with code 255. cnq, kuy, ycd, wvx, hms, mhr, tep, xqz, tlu, xrn, tfd, tkg, cdz, zwg, dlf,