Hello

with 4 jobs waiting to start, the Jenkins log is showing these repeat every few seconds any ideas? Could more debug output on where the "" string comes from be added please

Feb 23, 2016 12:39:57 PM SEVERE hudson.triggers.SafeTimerTask run
Timer task hudson.model.Queue$MaintainTask@42cad9 failed
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at jenkins.model.PeepholePermalink.resolve(PeepholePermalink.java:92)
at hudson.model.Job.getLastSuccessfulBuild(Job.java:854)
at hudson.model.Job.getEstimatedDurationCandidates(Job.java:941)
at hudson.model.Job.getEstimatedDuration(Job.java:975)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:335)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:318)
at hudson.model.Queue.maintain(Queue.java:1044)
at hudson.model.Queue$MaintainTask.doRun(Queue.java:2010)
at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Feb 23, 2016 12:40:02 PM SEVERE hudson.triggers.SafeTimerTask run
Timer task hudson.model.Queue$MaintainTask@42cad9 failed
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at jenkins.model.PeepholePermalink.resolve(PeepholePermalink.java:92)
at hudson.model.Job.getLastSuccessfulBuild(Job.java:854)
at hudson.model.Job.getEstimatedDurationCandidates(Job.java:941)
at hudson.model.Job.getEstimatedDuration(Job.java:975)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:335)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:318)
at hudson.model.Queue.maintain(Queue.java:1044)
at hudson.model.Queue$MaintainTask.doRun(Queue.java:2010)
at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Feb 23, 2016 12:40:07 PM SEVERE hudson.triggers.SafeTimerTask run
Timer task hudson.model.Queue$MaintainTask@42cad9 failed
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at jenkins.model.PeepholePermalink.resolve(PeepholePermalink.java:92)
at hudson.model.Job.getLastSuccessfulBuild(Job.java:854)
at hudson.model.Job.getEstimatedDurationCandidates(Job.java:941)
at hudson.model.Job.getEstimatedDuration(Job.java:975)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:335)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:318)
at hudson.model.Queue.maintain(Queue.java:1044)
at hudson.model.Queue$MaintainTask.doRun(Queue.java:2010)
at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Feb 23, 2016 12:40:12 PM SEVERE hudson.triggers.SafeTimerTask run
Timer task hudson.model.Queue$MaintainTask@42cad9 failed
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at jenkins.model.PeepholePermalink.resolve(PeepholePermalink.java:92)
at hudson.model.Job.getLastSuccessfulBuild(Job.java:854)
at hudson.model.Job.getEstimatedDurationCandidates(Job.java:941)
at hudson.model.Job.getEstimatedDuration(Job.java:975)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:335)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:318)
at hudson.model.Queue.maintain(Queue.java:1044)
at hudson.model.Queue$MaintainTask.doRun(Queue.java:2010)
at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Feb 23, 2016 12:40:17 PM SEVERE hudson.triggers.SafeTimerTask run
Timer task hudson.model.Queue$MaintainTask@42cad9 failed
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at jenkins.model.PeepholePermalink.resolve(PeepholePermalink.java:92)
at hudson.model.Job.getLastSuccessfulBuild(Job.java:854)
at hudson.model.Job.getEstimatedDurationCandidates(Job.java:941)
at hudson.model.Job.getEstimatedDuration(Job.java:975)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:335)
at hudson.model.queue.MappingWorksheet.<init>(MappingWorksheet.java:318)
at hudson.model.Queue.maintain(Queue.java:1044)
at hudson.model.Queue$MaintainTask.doRun(Queue.java:2010)
at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)