The default setting for tomcat heap allocation in IV is 2GB.  Some operations, such as uploading large files with base64 encoding, or installing or adapting large models, require more heap allocation

Checking the max heap allocation

First find the process id of the java process.  This command will show the process id and command of all processes belonging to tomcat 8 user

sudo ps -u tomcat8 -o pid,args

The output looks like this, in this case the process id of the java command is 817:

   PID COMMAND
   817 /usr/lib/jvm/java-1.8.0/bin/java -Dnop -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.awt.headless=t
 11782 audiowaveform --input-format wav -o /opt/tomcat/temp/1658498257196-0/original-recording.json -b 8

Then use the jinfo command to find the setting MaxHeapSize:

sudo jinfo 817|grep MaxHeapSize

The output looks like this, in this case the MaxHeapSize is set to 4294967296 or 4GB:

Non-default VM flags: -XX:CICompilerCount=4 -XX:InitialHeapSize=1073741824 -XX:MaxHeapSize=4294967296 -XX:MaxNewSize=697892864 -XX:MaxTenuringThreshold=6 -XX:MinHeapDeltaBytes=196608 -XX:NewSize=697892864 -XX:OldPLABSize=16 -XX:OldSize=375848960 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseConcMarkSweepGC -XX:+UseParNewGC

Increasing the max heap allocation

To increase the heap allocation to 4GB, create or modify the file setenv.sh in /opt/apache-tomcat-*/bin/ and add this line at the end:

JAVA_OPTS="$JAVA_OPTS -Xmx4096m"

And then restart tomcat