Common Pitfalls

Insufficient memory size for Docker containers

Appearance: When deploying a generated DIME application with docker-compose up the wildfly container may fail to build or stops silently during runtime due to lack of memory.

Stacktrace: Either watch out for the Wildfly to suddenly quit:

dywa-app_1     | *** JBossAS process (57) received KILL signal ***

Or for errors during the webdev build phase:

[WARNING]build_web_compilers:entrypoint on web/main.dart: Dart2Js failure: Dart2js exited with an unknown error
[...]
[SEVERE]build_web_compilers:entrypoint on web/main.dart: Dart2js exited with an unknown error
[...]
[SEVERE] FailureType: 1
#14 ERROR: executor failed running [/bin/sh -c /root/.pub-cache/bin/webdev build]: exit code: 1

Reason: The memory size available for Docker containers is insufficient.

Solution: Increase the available memory size in the Docker settings.

The Deployment View fails to start

Appearance: When opening the Deployment View, the following error is reported.

java.lang.RuntimeException: The Deployment View is not supported on a runtime environment without Docker
	at info.scce.dime.ui.deployment.view.DeploymentView.createPartControl(DeploymentView.java:136)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:153)
	...
Caused by: info.scce.gantry.Environment$EnvironmentException: We failed connecting to the docker daemon
	at info.scce.gantry.impl.DockerEnvironment.checkPreconditions(DockerEnvironment.java:89)
	at info.scce.dime.ui.deployment.view.DeploymentView.createPartControl(DeploymentView.java:134)
	...
Caused by: java.lang.RuntimeException: java.io.IOException: native connect() failed : Permission denied
	at com.github.dockerjava.httpclient5.ApacheDockerHttpClientImpl.execute(ApacheDockerHttpClientImpl.java:162)
	at com.github.dockerjava.httpclient5.ApacheDockerHttpClient.execute(ApacheDockerHttpClient.java:8)
	...
Caused by: java.io.IOException: native connect() failed : Permission denied
	at com.github.dockerjava.httpclient5.UnixDomainSocket.connect(UnixDomainSocket.java:157)
	at org.apache.hc.client5.http.socket.PlainConnectionSocketFactory$1.run(PlainConnectionSocketFactory.java:87)
	...

Observation: Since Docker requires root privileges, the Deployment View fails if DIME was started by a regular user.

Solution: Make sure the user, which starts DIME, is part of the docker group. See Note for Linux Users.