Build failed in Jenkins: cayenne-master » derby,JDK 1.8 (latest),ubuntu #555

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See <https://builds.apache.org/job/cayenne-master/cayenneTestConnection=derby,jdk=JDK%201.8%20(latest),slave=ubuntu/555/changes>

Changes:

[andrus] CAY-2226 PK generation for Frontbase: PK cache size must be ignored

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Started by upstream project "cayenne-master" build number 555
originally caused by:
 Started by an SCM change
[EnvInject] - Loading node environment variables.
Building remotely on H23 (ubuntu) in workspace <https://builds.apache.org/job/cayenne-master/cayenneTestConnection=derby,jdk=JDK%201.8%20(latest),slave=ubuntu/ws/>
Cloning the remote Git repository
Cloning repository https://git-wip-us.apache.org/repos/asf/cayenne.git
 > git init <https://builds.apache.org/job/cayenne-master/cayenneTestConnection=derby,jdk=JDK%201.8%20(latest),slave=ubuntu/ws/> # timeout=10
Fetching upstream changes from https://git-wip-us.apache.org/repos/asf/cayenne.git
 > git --version # timeout=10
 > git -c core.askpass=true fetch --tags --progress https://git-wip-us.apache.org/repos/asf/cayenne.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url https://git-wip-us.apache.org/repos/asf/cayenne.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url https://git-wip-us.apache.org/repos/asf/cayenne.git # timeout=10
Fetching upstream changes from https://git-wip-us.apache.org/repos/asf/cayenne.git
 > git -c core.askpass=true fetch --tags --progress https://git-wip-us.apache.org/repos/asf/cayenne.git +refs/heads/*:refs/remotes/origin/*
Checking out Revision bf046a22d92972e2293266a772c60d777c23d352 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f bf046a22d92972e2293266a772c60d777c23d352
 > git rev-list 871574bcc0d2778c5421a677959eaedb8e19c58b # timeout=10
Cleaning workspace
 > git rev-parse --verify HEAD # timeout=10
Resetting working tree
 > git reset --hard # timeout=10
 > git clean -fdx # timeout=10
[ubuntu] $ /home/jenkins/tools/maven/latest3/bin/mvn "-Djdk=JDK 1.8 (latest)" -Dslave=ubuntu -DcayenneTestConnection=derby -v
Error: JAVA_HOME is not defined correctly.
  We cannot execute /home/jenkins/tools/java/latest1.8/bin/java
Build step 'Invoke top-level Maven targets' marked build as failure
Recording test results
ERROR: Step ?Publish JUnit test result report? failed: No test report files were found. Configuration error?

Jenkins build is back to normal : cayenne-master » derby,JDK 1.8 (latest),ubuntu #556

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See <https://builds.apache.org/job/cayenne-master/cayenneTestConnection=derby,jdk=JDK%201.8%20(latest),slave=ubuntu/556/changes>