parpool warning: A task was unexpectedly found in state: Unavailable.

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Jean Paul
Jean Paul on 30 May 2019
Commented: Antonios Armaou on 18 Nov 2021
The program still works correctly, but I cannot explai the warning
Starting parallel pool (parpool) using the 'local' profile ...
Warning: A task was unexpectedly found in state: Unavailable.
> In parallel.cluster.Local/deriveJobStateFromTasks (line 29)
In parallel.cluster.Local/getJobState (line 179)
In parallel.cluster.CJSCluster/hGetJobState (line 358)
In parallel.internal.cluster.CJSJobMixin/hGetStateEnum (line 144)
In parallel.Job/get.StateEnum (line 238)
In parallel.Job/get.State (line 230)
In parallel.internal.customattr.CustomGetSet>iVectorisedGetHelper (line 128)
In parallel.internal.customattr.CustomGetSet>@(a,b,c)iVectorisedGetHelper(obj,a,b,c) (line 102)
In parallel.internal.customattr.CustomGetSet/doVectorisedGet (line 103)
In parallel.internal.customattr.CustomGetSet/hVectorisedGet (line 76)
In parallel.internal.customattr.GetSetImpl>iAccessProperties (line 322)
In parallel.internal.customattr.GetSetImpl>iGetAllPropertiesVec (line 264)
In parallel.internal.customattr.GetSetImpl.getImpl (line 133)
In parallel.internal.customattr.CustomGetSet>iHetFunGetFunction (line 154)
In parallel.internal.customattr.CustomGetSet>@(o)iHetFunGetFunction(o,props) (line 139)
In parallel.internal.cluster.hetfun (line 46)
In parallel.internal.customattr.CustomGetSet>iHetFunGetProperty (line 139)
In parallel.internal.customattr.CustomGetSet/get (line 38)
In parallel.internal.pool.InteractiveClient/pRemoveOldJobs (line 476)
In parallel.internal.pool.InteractiveClient/start (line 317)
In parallel.Pool>iStartClient (line 796)
In parallel.Pool.hBuildPool (line 585)
In parallel.internal.pool.doParpool (line 18)
In parpool (line 98)
In utils.SERVER (line 5)
Connected to the parallel pool (number of workers: 32).

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Answers (2)

Mirko Job
Mirko Job on 16 Sep 2019
You have to delete the folder "local_scheduler_data" from "C:\Users\[your pc]\AppData\Roaming\MathWorks\MATLAB"
Enrique Rodriguez Sebastian
Hi all!
I have similar warning:
Warning: A task was unexpectedly found in state: Unavailable.
> In parallel.cluster.Local/deriveJobStateFromTasks (line 29)
In parallel.cluster/Local/getJobState (line 174)
In parallel.cluster/CJSCluster/hGetJobState (line 375)
In parallel.internal.cluster/CJSJobMixin/hGetStateEnum (line 175)
In parallel.Job.get.StateEnum (line 242)
In parallel.Job.get.State (line 234)
In parallel.internal.customattr.CustomGetSet>iVectorisedGetHelper (line 128)
In parallel.internal.customattr.CustomGetSet>@(a,b,c)iVectorisedGetHelper(obj,a,b,c) (line 102)
In parallel.internal.customattr/CustomGetSet/doVectorisedGet (line 103)
In parallel.internal.customattr/CustomGetSet/hVectorisedGet (line 76)
In parallel.internal.customattr.GetSetImpl>iAccessProperties (line 322)
In parallel.internal.customattr.GetSetImpl>iGetAllPropertiesVec (line 264)
In parallel.internal.customattr/GetSetImpl/getImpl (line 133)
In parallel.internal.customattr.CustomGetSet>iHetFunGetFunction (line 154)
In parallel.internal.customattr.CustomGetSet>@(o)iHetFunGetFunction(o,props) (line 139)
In parallel.internal.cluster.hetfun (line 46)
In parallel.internal.customattr.CustomGetSet>iHetFunGetProperty (line 139)
In parallel.internal.customattr/CustomGetSet/get (line 38)
In parallel.internal.pool/InteractiveClient/pRemoveOldJobs (line 468)
In parallel.internal.pool/InteractiveClient/start (line 311)
In parallel.internal.pool.AbstractClusterPool>iStartClient (line 826)
In parallel.internal.pool/AbstractClusterPool/hBuildPool (line 596)
In parallel.internal.pool.doParpool (line 20)
In parpool (line 122)
In parallel.internal.pool/PoolArrayManager/getOrAutoCreateWithCleanup (line 58)
In pctTryCreatePoolIfNecessary (line 28)
In parallel_function (line 418)
But I couldn´t find the folder "local_scheduler_data" from "C:\Users\[your pc]\AppData\Roaming\MathWorks\MATLAB"
In that path I have: local_cluster_jobs, R2020a and R2020a_licenses folders
What can I do to solve it?

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