ISPN build for IBM Java ends with error in Ant execution task

keytool error (likely untranslated): java.io.IOException: Invalid keystore format
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.8:run (create-certificates) on project infinispan-server-hotrod: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] /home/jenkins/workspace/jdg-func-ispn-testsuite-rhel-os/9c249257/infinispan/server/hotrod/target/antrun/build-main.xml:14: Java returned: 1
[ERROR] around Ant part ...<keytool command="-importkeystore">... @ 78:38 in /home/jenkins/workspace/jdg-func-ispn-testsuite-rhel-os/9c249257/infinispan/server/hotrod/target/antrun/build-main.xml