Serializer Exception causes deadlock in sync queries

[konsultaner]

I try to switch from arangodb 3.9 to 3.12 and therfore updated to the latest driver version. I have a couple of synced query executions. One recently ended up onto a deadlock situation with the following error:

No serializer found for class Component$CookingInstruction and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_B
EANS) 

WARN  i.v.core.impl.BlockedThreadChecker - Thread Thread[adb-http-0,5,main] has been blocked for 2437 ms, time limit is 2000 ms

...

io.vertx.core.VertxException: Thread blocked

The issue was a static class that had only no field visibility definitions.

public static class MyBean {
    String name;
}

It's ok that the class causes the bean serializer issue, but I think the deadlock should not happen.

[rashtao]

Hi @konsultaner ,
unfortunately I cannot reproduce your issue. Using MyBean causes the exception JsonMappingException to be thrown in the caller thread. The connection thread is not blocked and I have no deadlock.
Can you please provide a reproducible code snippet?

[konsultaner]

Oh OK, I'll try asap.