API doesn't cleanly shut down

[catbref]

2020-08-10 14:38:40 INFO  Controller:694 - Shutting down API
2020-08-10 14:39:10 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1320826684]@4eba373c{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1320826684-828,5,main]
2020-08-10 14:39:10 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1320826684]@4eba373c{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1320826684-1149,5,main]
2020-08-10 14:39:10 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1320826684]@4eba373c{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1320826684-870,5,main]
2020-08-10 14:39:10 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1320826684]@4eba373c{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1320826684-995,5,main]
2020-08-10 14:39:10 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1320826684]@4eba373c{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1320826684-1192,5,main]
2020-08-10 14:39:10 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1320826684]@4eba373c{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1320826684-1026,5,main]

Possible cause could be a long-living API call that hasn't exited?
Potentially /admin/forcesync?

[muckee]

I have the same error running 1.3.1 on windows 10. Prior to this series of warnings, I have the following error messages:

2020-08-11 14:19:29 ERROR Context:109 - Performing thread fixup: you are accessing bitcoinj via a thread that has not had any context set on it.
2020-08-11 14:19:29 ERROR Context:110 - This error has been corrected for, but doing this makes your app less robust.
2020-08-11 14:19:29 ERROR Context:111 - You should use Context.propagate() or a ContextPropagatingThreadFactory.
2020-08-11 14:19:29 ERROR Context:112 - Please refer to the user guide for more information about this.
2020-08-11 14:19:29 ERROR Context:113 - Thread name is qtp1043584830-2943.
2020-08-11 14:27:05 INFO  SysTray:250 - Running NTP configuration script: ntpcfg.bat
2020-08-11 14:27:57 INFO  Controller:694 - Shutting down API
2020-08-11 14:28:27 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1043584830]@3e33d73e{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1043584830-7724,5,main]
2020-08-11 14:28:27 WARN  QueuedThreadPool:243 - QueuedThreadPool[qtp1043584830]@3e33d73e{STOPPING,8<=0<=200,i=8,r=-1,q=0}[NO_TRY] Couldn't stop Thread[qtp1043584830-7709,5,main]
...