mvn clean install – Could not reserve enough space for object heap

If you get the following error, it is most likely that the “Surefire” pluggin does not have enough memory.

Error occurred during initialization of VM
Could not create the Java virtual machine.
Could not reserve enough space for object heap
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] There are test failures.

The solution is to increase the memory for the Surefire pluggin using the command line option:

mvn -Dsurefire.memory="-Xmx512m" clean install

mvn deploy – java.lang.OutOfMemoryError

If you are doing a mvn deploy and get the following error:

[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Java heap space
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.OutOfMemoryError: Java heap space

The problem is most likely that Maven has run out of memory. By default maven sets a maximum memory size of 64mbs. When deploying a large file such as a 15mb+ jar file it can easily run out of memory.

The simple but not so obvious solution is to tell maven to set the max memory size in the MAVEN_OPTS environment variable:

MAVEN_OPTS="-Xmx128m"

Now execute your deploy again and it should work fine!