[Openwebnet] Excepion in thread - java.lang.NullPointerException

[dirkpitt74]

Hi,
after the upgrade from 4.1 to the next version (4.2 and now to 4.3) the system became unstable.
No error on log file but the journalctlreport a three excepion like this one:

dic 16 07:25:50 OpenHAB karaf[252239]: Exception in thread "Thread-190" java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "key" is null
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetBridgeHandler.getRegisteredDevice(OpenWebNetBridgeHandler.java:440)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetLightingHandler.handleMessage(OpenWebNetLightingHandler.java:275)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetBridgeHandler.onEventMessage(OpenWebNetBridgeHandler.java:606)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openwebnet4j.OpenGateway.lambda$onMessage$4(OpenGateway.java:189)
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openwebnet4j.OpenGateway$1.run(OpenGateway.java:271)
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.lang.Thread.run(Thread.java:840)
dic 16 07:25:50 OpenHAB karaf[252239]: Exception in thread "Thread-194" java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "key" is null
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetBridgeHandler.getRegisteredDevice(OpenWebNetBridgeHandler.java:440)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetLightingHandler.handleMessage(OpenWebNetLightingHandler.java:275)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetBridgeHandler.onEventMessage(OpenWebNetBridgeHandler.java:606)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openwebnet4j.OpenGateway.lambda$onMessage$4(OpenGateway.java:189)
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openwebnet4j.OpenGateway$1.run(OpenGateway.java:271)
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.lang.Thread.run(Thread.java:840)
dic 16 07:25:50 OpenHAB karaf[252239]: Exception in thread "Thread-195" java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "key" is null
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetBridgeHandler.getRegisteredDevice(OpenWebNetBridgeHandler.java:440)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetLightingHandler.handleMessage(OpenWebNetLightingHandler.java:275)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openhab.binding.openwebnet.internal.handler.OpenWebNetBridgeHandler.onEventMessage(OpenWebNetBridgeHandler.java:606)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openwebnet4j.OpenGateway.lambda$onMessage$4(OpenGateway.java:189)
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
dic 16 07:25:50 OpenHAB karaf[252239]:         at org.openwebnet4j.OpenGateway$1.run(OpenGateway.java:271)
dic 16 07:25:50 OpenHAB karaf[252239]:         at java.base/java.lang.Thread.run(Thread.java:840)

And after

dic 16 07:27:53 OpenHAB karaf[252239]: Exception in thread "Thread-1075" java.lang.NullPointerException
dic 16 07:27:53 OpenHAB karaf[252239]: Exception in thread "Thread-1079" java.lang.NullPointerException
dic 16 07:27:53 OpenHAB karaf[252239]: Exception in thread "Thread-1080" java.lang.NullPointerException
dic 16 07:28:24 OpenHAB karaf[252239]: Exception in thread "Thread-1317" java.lang.NullPointerException
dic 16 07:28:24 OpenHAB karaf[252239]: Exception in thread "Thread-1321" java.lang.NullPointerException
dic 16 07:28:25 OpenHAB karaf[252239]: Exception in thread "Thread-1322" java.lang.NullPointerException
dic 16 07:29:01 OpenHAB karaf[252239]: Exception in thread "Thread-1497" java.lang.NullPointerException
dic 16 07:29:01 OpenHAB karaf[252239]: Exception in thread "Thread-1502" java.lang.NullPointerException
dic 16 07:29:01 OpenHAB karaf[252239]: Exception in thread "Thread-1503" java.lang.NullPointerException
dic 16 07:30:01 OpenHAB karaf[252239]: Exception in thread "Thread-1778" java.lang.NullPointerException
dic 16 07:30:01 OpenHAB karaf[252239]: Exception in thread "Thread-1783" java.lang.NullPointerException
dic 16 07:30:01 OpenHAB karaf[252239]: Exception in thread "Thread-1784" java.lang.NullPointerException

After about a day the system became unstable and need a reboot.
No error reported in openhab log file. In journalctl I will find a lot of warning for a faliled thread start like this one:

dic 12 06:09:00 OpenHAB karaf[894]: [46351,181s][warning][os,thread] Failed to start the native thread for java.lang.Thread "OH-JsonStorage-20814"

Since it was impossible to access via web or ssh, I connected a monitor and a keyboard to the raspberry and with the service openhab status command I verified that the task limit had been reached.
It seems that tasks are opened but not closed correctly, occupying the resources assigned to the service.

I'm on OpenHAB 4.3.0 with only openwebnet and astro binding.
My system is a Raspberry Pi 5 with 8GB with boot from SSD.

If necessary I can perform further tests to narrow down the problem.
I await your instructions

Thank you.

Giovanni

[lsiepel]

I can try to look at it tomorrow. The stacktrace should give some information for the NPE