adcgnjar gets Java memory error

After custom Java code files are copied to EBS file system, adcgnjar gets Java error.

$ which adcgnjar

$AD_TOP//bin/adcgnjar

$ adcgnjar

Copyright (c) 2002, 2012 Oracle Corporation

Redwood Shores, California, USA

AD Custom Jar Generation

Version 12.2.0

... ...

About to Generate customall.jar : Fri Sep 26 2025 11:59:42

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

at oracle.apps.ad.jri.fwk.ZipFileResourceUnitArea.getResourceUnit(ZipFileResourceUnitArea.java:914)

at oracle.apps.ad.jri.fwk.JRIArchiveOutputUtils.scanAllResourceUnits(JRIArchiveOutputUtils.java:659)

at oracle.apps.ad.jri.fwk.JRIArchiveOutputUtils.updateJRIArchiveZip(JRIArchiveOutputUtils.java:285)

at oracle.apps.ad.jri.fwk.JRIArchiveOutputUtils.writeJRIArchive(JRIArchiveOutputUtils.java:218)

at oracle.apps.ad.jri.adjmx.mergeAndExtract(adjmx.java:1395)

at oracle.apps.ad.jri.adjmx.main(adjmx.java:592)

error:

Failed to generate customall.jar

Restoring customall.bak to customall.jar

Add memory to server may not fix the problem. Fix:

$ export JAVA_TOOL_OPTIONS="-verbose -Xmx2500M -Xms2500M"

Then, run adcgnjar again.