Hi,
I also get this problem, massively at night.This is just a short section from my log file.
After that no item update works anymore.
OH: 2.5.5.1
HW: Raspi3 Model B
HomematicRaspi: 3.51.6.20200229
I added a cron job yesterday to toggle a switch. After this problem occurs, no update event is received anymore.
I can support with any other tests you like.
I guess tomorrow the same problem happens again.
Line 1: 2020-06-09 04:07:49.491 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 49: 2020-06-09 04:07:49.511 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 96: 2020-06-09 04:07:49.765 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 143: 2020-06-09 04:07:49.778 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 190: 2020-06-09 04:07:49.836 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 237: 2020-06-09 04:07:49.844 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 284: 2020-06-09 04:07:49.884 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 331: 2020-06-09 04:07:49.914 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 378: 2020-06-09 04:07:49.953 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 425: 2020-06-09 04:07:49.963 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 472: 2020-06-09 04:07:50.029 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 519: 2020-06-09 04:07:50.013 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 566: 2020-06-09 04:07:50.055 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 613: 2020-06-09 04:07:50.095 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 660: 2020-06-09 04:07:50.112 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 707: 2020-06-09 04:07:50.133 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 754: 2020-06-09 04:07:50.153 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 801: 2020-06-09 04:07:50.201 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 848: 2020-06-09 04:07:50.205 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 895: 2020-06-09 04:07:50.268 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 943: 2020-06-09 04:07:50.285 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 990: 2020-06-09 04:07:50.324 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1038: 2020-06-09 04:07:50.411 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1085: 2020-06-09 04:07:50.349 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1132: 2020-06-09 04:07:50.435 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1179: 2020-06-09 04:07:50.463 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1226: 2020-06-09 04:07:50.458 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1273: 2020-06-09 04:07:50.509 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1320: 2020-06-09 04:07:50.518 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1368: 2020-06-09 04:07:50.554 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1415: 2020-06-09 04:07:50.591 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1463: 2020-06-09 04:07:50.597 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1510: 2020-06-09 04:07:50.678 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1557: 2020-06-09 04:07:50.678 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1603: 2020-06-09 04:07:50.732 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1650: 2020-06-09 04:07:50.748 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1697: 2020-06-09 04:07:50.837 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1744: 2020-06-09 04:07:50.831 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1791: 2020-06-09 04:07:50.909 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1838: 2020-06-09 04:07:50.912 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1885: 2020-06-09 04:07:50.951 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1932: 2020-06-09 04:07:50.953 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 1979: 2020-06-09 04:07:51.119 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2026: 2020-06-09 04:07:51.137 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2073: 2020-06-09 04:07:51.167 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2120: 2020-06-09 04:07:51.156 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2167: 2020-06-09 04:07:51.177 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2214: 2020-06-09 04:07:51.208 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2261: 2020-06-09 04:07:51.217 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2308: 2020-06-09 04:07:51.225 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2356: 2020-06-09 04:07:51.247 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2404: 2020-06-09 04:07:51.236 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2451: 2020-06-09 04:07:51.324 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2498: 2020-06-09 04:07:51.320 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2545: 2020-06-09 04:07:51.364 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2592: 2020-06-09 04:07:51.411 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]
Line 2639: 2020-06-09 04:07:51.415 [ERROR] [ternal.handler.HomematicThingHandler] - java.util.concurrent.RejectedExecutionException: Max requests queued per destination 1024 exceeded for HttpDestination[http://192.168.178.38:2010]@251b62,queue=1024,pool=DuplexConnectionPool@86a110[c=2/2,a=2,i=0]