Right now the hudson-jacoco-plugin will crash if it is invoked atfter the build is done and the build didn't run jacoco. It should rather gracefully do nothing.

The following exception occours:

java.io.FileNotFoundException: ..../jacoco/classes (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:137)
at org.jacoco.core.analysis.Analyzer.analyzeAll(Analyzer.java:181)
at hudson.plugins.jacoco.ExecutionFileLoader.analyzeStructure(ExecutionFileLoader.java:110)
at hudson.plugins.jacoco.ExecutionFileLoader.loadBundleCoverage(ExecutionFileLoader.java:116)