I ran into a situation where only two valid moves that is allowed happens during the construction phase. This results in a situation where there is no valid moves to perform during local search phase. All the moves tried during the local search phase is not doable.
This results in NullPointerException at the end of local search phase.
Exception in thread "main" java.lang.NullPointerException
at org.optaplanner.core.impl.solver.scope.DefaultSolverScope.getBestScoreWithUninitializedPrefix(DefaultSolverScope.java:205)
at org.optaplanner.core.impl.solver.DefaultSolver.outerSolvingEnded(DefaultSolver.java:216)
at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:161)
at com.example.jobplanner.Application.main(Application.java:328)
Here is the trace of the two valid moves that happens during the construction phase.
CH step (0), time spent (151), score (0hard/0soft), selected move count (1), picked move (com.example.jobplanner.domain.ServiceJobChip#981500 => com.example.jobplanner.domain.ShopFloorBay#9da471).
Update [fact 0:5:4216052:4216052:10:DEFAULT:NON_TRAIT:com.example.jobplanner.domain.ServiceJobChip#4054f4]
CH step (1), time spent (158), score (0hard/0soft), selected move count (1), picked move (com.example.jobplanner.domain.ServiceJobChip#4054f4 => com.example.jobplanner.domain.ShopFloorBay#15ac5d5).
Construction Heuristic phase (0) ended: step total (2), time spent (159), best score (null).
The model of the domain I am trying to optimize would be something like:
Each bay has --> set of tasks that can be performed
Job -> collection of tasks to be performed
Task --> can be scheduled to bays which can perform the task
Related
I am writing a modified version of the Task Assignment example with my own domain model.
In my model each Task can have a NextTask and a PreviousTask and an Assignee. All 3 are configured as PlanningVariables:
...
/** PreviousTask is a calculated task that the Resource will complete before this one. */
#PlanningVariable(valueRangeProviderRefs = { "tasksRange" }, graphType = PlanningVariableGraphType.CHAINED)
public Task PreviousTask;
#InverseRelationShadowVariable(sourceVariableName = "PreviousTask")
public Task NextTask;
#AnchorShadowVariable(sourceVariableName = "PreviousTask")
public Resource Assignee;
I have been stuck on the Local Search Phase step for some time now as it appears to require an initialized state of my planning variables (Task.PreviousTask in this case).
Error log:
2020-07-16 15:00:15.341 INFO 4616 --- [pool-1-thread-1] o.o.core.impl.solver.DefaultSolver : Solving started: time spent (65), best score (-27init/[0]hard/[0/0/0/0]soft), environment mode (REPRODUCIBLE), random (JDK with seed 0).
2020-07-16 15:00:15.356 INFO 4616 --- [pool-1-thread-1] .c.i.c.DefaultConstructionHeuristicPhase : Construction Heuristic phase (0) ended: time spent (81), best score (-27init/[0]hard/[0/0/0/0]soft), score calculation speed (90/sec), step total (0).
2020-07-16 15:00:15.376 ERROR 4616 --- [pool-1-thread-1] o.o.c.impl.solver.DefaultSolverManager : Solving failed for problemId (5e433f57-8c75-4756-8a9c-4c4ca4a83d6d).
java.lang.IllegalStateException: Local Search phase (1) needs to start from an initialized solution, but the planning variable (Task.PreviousTask) is uninitialized for the entity (com.redhat.optaplannersbs.domain.Task#697ea710).
Maybe there is no Construction Heuristic configured before this phase to initialize the solution.
I've been pouring over the documentation and trying to figure out what I've missed or broken between it and the source example but I cannot work it out. I have no Construction Heuristic configured (Same as the example), and I could not see where in the example does it ever set the previousTaskOrEmployee variable before solving.
I could supply a random PreviousTask in the initial solution model, but surely at least 1 of the tasks would have no previous task?
May I ask if you have <localSearch/> in your solverConfig.xml? If so, the <constructionHeuristic/> has to be there as well.
If none of these phases (CH nor LS) is configured, both Construction Heuristic and Local Search is added with default parameters. But once the appears in the solverConfig.xml, it's considered an override of the defaults, and a user is supposed to take care of initializing the solution (most often by providing the Construction Heuristic configuration).
I have a test that was alerting because it was taking extra time for an asset to load. We changed from waitForNoRequest to a pause (at Catchpoint's suggestion). That did not seem to have the expected effect of waiting for things to load. We increased the pause from 3000 to 12000 and that helped to allow the page to load and stop the alert. We noticed some more alerts, so I tried to increase the pause to something like 45000 and it would not allow me to pause for that long.
So the main question here is - what functionality does both of these different features provide? What do I gain by pausing instead of waiting, if anything?
Here's the test, data changed to protect company specific info. Step 3 is where we had some failures and we switched between pause and wait.
// Step - 1
open("https://website.com/")
waitForNoRequest("2000")
click("//*[#id=\"userid\"]")
type("//*[#id=\"userid\"]", "${username}")
setStepName("Step1-Login-")
// Step - 2
clickMouseAndWait("//*[#id=\"continue\"]")
waitForVisible("//*[#id=\"challenge-password\"]")
click("//*[#id=\"challenge-password\"]")
type("//*[#id=\"challenge-password\"]", "${password}")
setStepName("Step2-Login-creds")
// Step - 3
clickMouseAndWait("//*[#id=\"signIn\"]")
setStepName("Step3-dashboard")
waitForTitle("Dashboard")
waitForNoRequest("3000")
click("//*[#id=\"account-header-wrapper\"]")
waitForVisible("//*[#id=\"logout-link\"]")
click("//*[#id=\"logout-link\"]")
// Step - 4
clickAndWait("//*[text()=\"Sign Out\"]")
waitForTitle("Login - ")
verifyTextPresent("You have been logged out.")
setStepName("Step5-Logout")
Rachana here, I’m a member of the Technical Service Team here at Catchpoint, I’ll be happy to answer your questions.
Please find the differences below between waitForNoRequest and Pause commands:
Pause
Purpose: This command pauses the script execution for a specified amount of time, whether there are HTTP/s requests downloading or not. Time value is provided in milliseconds, it can range between 100 to 30,000 ms.
Explanation: This command is used when the agent needs to wait for a set amount of time and this is not impacted by the way the requests are loaded before proceeding to the next step or command. Only a parameter is required for this action.
WaitForNoRequest
Purpose: This commands waits for a specified amount of time, when there was no HTTP/s requests downloading. The wait time parameter can range between 1,000 to 5,000 ms.
Explanation: The only parameter for this action is a wait time. The agent will wait for that specified amount of time before moving onto the next step/command. Which will, in return, allow necessary requests more time to load after document complete.
For instance when you add waitforNoRequest(5000), initially agent waits 5000 ms after doc complete for any network activity. During that period if there is any network activity, then the agent waits another 5000 ms for the next network activity to end and the process goes on until no other request loads within the specified timeframe(5000 ms).
A pause command with 12000 ms, gives exactly 12 seconds to load the page. After 12 seconds the script execution will continue to next command no matter the page is loaded or not.
Since waitForNoRequest has a max time value of 5000 ms, you can tell the agent to wait for a gap of 5 seconds when there is no network activity. In this case, the page did not have any network activity for 3 seconds and hence proceeded to the next action. The page was not loaded completely and the script failed.
I tried to increase the pause to something like 45000 and it would not allow me to pause for that long.
We allow a maximum of 30 seconds pause time hence 45 seconds will not work.
Please reach out to our support team and we’ll be glad to connect you with our scripting SMEs and help you with any scripting needs you might have.
I have set up a solver with two local search phases and it works fine. However, there was a time that the 2nd phase didn't make any move in about 1 minute, as the log shows below:
...
2016-05-07 14:14:55,847 [main] DEBUG LS step (10069), time spent (593822), score (0hard/-81medium/5395020soft), best score (0hard/-80medium/5393781soft), accepted/selected move count (5/48), picked move (CL [cID=1147576, id=27246 => SL [id=49, sID=E942648]] <=> CL [cID=1133912, id=14716 => SL [ id=7, sID=E942592]]).
2016-05-07 14:14:55,858 [main] DEBUG LS step (10070), time spent (593833), score (0hard/-81medium/5395390soft), best score (0hard/-80medium/5393781soft), accepted/selected move count (5/18), picked move (CL [cID=1142322, id=22533 => SL [ id=51, sID=E943251]] <=> CL [cID=1134362, id=14118 => SL [ id=49, sID=E942648]]).
2016-05-07 14:14:55,858 [main] INFO Local Search phase (1) ended: step total (10071), time spent (593833), best score (0hard/-80medium/5393781soft).
2016-05-07 14:16:05,042 [main] INFO Local Search phase (2) ended: step total (0), time spent (663017), best score (0hard/-80medium/5393781soft).
2016-05-07 14:16:05,042 [main] INFO Solving ended: time spent (663017), best score (0hard/-80medium/5393781soft), average calculate count per second (2771).
Before phase 1 ended, there wasn't any improvement in the last couple of steps. And phase 2 started but made 0 step in a minute. The solver then ended because it has reached the maximum time allowed.
I'm a bit surprised that phase 2 made no step at all. Is it simply because it didn't manage to find any better score?
If you don't see any moves in TRACE log (as suggested in comments), it could be because you're using a custom move list factory and that's taken too long to initialize.
I am developing a solver using Optaplanner 6.1.0, similar to the Vehicle Routing Problem. When I run my solver on 700 installers and 200 bookings, it will successfully solve the planning problem. But, when I used against a larger dataset (700 installers and 1220 bookings), I get
Caused by: java.lang.IllegalStateException: Local Search phase started with an uninitialized Solution. First initialize the Solution. For example, run a Construction Heuristic phase first.
but right before the exception,
16:10:40,378 INFO [DefaultConstructionHeuristicPhase] [http-listener-1(4)] Construction Heuristic phase (0) ended: step total (194), time spent (30693), best score (-1hard/-688803soft).
I am using <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>
in my config.
Am I using it wrong?
Maybe the value range for a planning variable is empty. Especially with value range provider from entity, this is more likely. Feel free to file a jira that the error message should improve in such a case.
Diagnostic todo: Comment out the local solver phase, run the solver (so it only does the construction heuristic) and then iterate through the planning entities and print out the value for each planning value. Check if there are any nulls in there.
The fact that you have 194 steps, instead 200 steps in your CH indicates this. (If those other 6 planning entities are immovable, this won't trigger this exception (more info), so that's not the problem.)
I have a waf task that is running a msbuild in order to build a project but I do want to run this only if last execution was not successful.
How should I do this?
Store in your build.env.MS_SUCC = 1 and retrieve the value from the previous build (for the first time you naturally have to check if the dict item MS_SUCC exists)