sbt, "java.lang.OutOfMemoryError: Java 堆空间"

Question

I'm trying to replicate the openie4.0 program by: https://github.com/knowitall/openie

The environment is Ubuntu: 18.04, Scala: 2.10.2, Java: 1.7.0_80, sbt: 0.13.18,

I managed to get to the step of "running with sbt:" ''' sbt 'run-main edu.knowitall.openie.OpenIECli' '''

However, I kept facing with the problem of

java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space

when I step into to create the stand-alone jar, when using:

sbt clean compile assembly

while trying "sbt -J-Xmx2700M clean compile assembly" (or larger, say 10g, I have 64g on my computer) The above out of memeory problem continues plus:

java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
[error] Not a valid command: J-Xmx10g
[error] Not a valid project ID: J-Xmx10g
[error] Expected ':' (if selecting a configuration)
[error] Not a valid key: J-Xmx10g
[error] J-Xmx10g
[error]     

This is super confusing why this command isn't a valid one and I didn't find a solution for this.

Later on I tried to set the universal JAVA_OPTS, not working. Then I take the suggestions from user972946 (last one), which suggest its overriden since the default settings. How to set heap size for sbt? .

Then trying after fixing as he suggested,but still the same.....

env JAVA_OPTS="-Xmx41200m" sbt clean compile assembly

I also took the suggestion from Mike and Cassio from the above link...not working at all.

Really appreciate on any suggestions on this.

Many thanks. HZ

Answer 1

According to Baeldung:

Try exporting this environment variable before running it:

export SBT_OPTS="-XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=10G -Xmx10G -Xms10G"

Alternatively, SBT allows us to specify the JVM options on a file named .jvmopts . create a file called .jvmopts in the root of your project and put this inside:

-Xms1g
-Xmx4g

Answer 2

If you take a look at the following line:

[error] Not a valid command: J-Xmx10g

Your sbt cannot resolve this as a valid option, this can be issued since you're using java 7 (make sure java7 accepts -Xmx$size as a valid argument), the same thing goes for sbt 0.13 (which is pretty old). there also must be a file or something related to deployments (a guide or a CI/CD file or something) that you can take help from on how to run the project. (if you use java 8 everything should be fine probably)