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java.lang.NullPointerException: 	at org.cerberus.engine.execution.impl.ExecutionCheckService.compareBuild(ExecutionCheckService.java:322)	at org.cerberus.engine.execution.impl.ExecutionCheckService.checkTargetBuildRevision(ExecutionCheckService.java:237)	at org.cerberus.engine.execution.impl.ExecutionCheckService.checkTestCaseExecution(ExecutionCheckService.java:87)	at org.cerberus.engine.execution.impl.ExecutionStartService.startExecution(ExecutionStartService.java:330)	at org.cerberus.engine.execution.impl.RunTestCaseService.runTestCase(RunTestCaseService.java:56)	at org.cerberus.servlet.zzpublic.RunTestCase.doGet(RunTestCase.java:346)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)