Access Federation - group sync does not work

Artifactory1 is the source

Artifactory2 is the target

Add User to Artifactory1 - works

Add group to Artifactory1 that contains that user - sync fails

source logs:

2018-04-26 15:05:29,247 [parallel-5] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceFluxSinkAdapter:244) - Sending 2 elements to FederationServer(name=access-2, url=http://localhost:8082/access)

2018-04-26 15:05:29,853 [pool-17-thread-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.RestCommunicationHandler:78) - Publish changes to another access peer http://localhost:8082/access successfully

target logs:

2018-04-26 15:05:29,829 [http-nio-8082-exec-6] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:192) - Processing 1 federation changes of type users

2018-04-26 15:05:29,852 [single-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:177) - An exception of type IllegalStateException occurred, sleeping 1000 millis and retrying...

2018-04-26 15:05:30,858 [parallel-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:192) - Processing 1 federation changes of type users

2018-04-26 15:05:30,864 [single-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:177) - An exception of type IllegalStateException occurred, sleeping 2000 millis and retrying...

2018-04-26 15:05:32,870 [parallel-2] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:192) - Processing 1 federation changes of type users

2018-04-26 15:05:32,872 [single-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:177) - An exception of type IllegalStateException occurred, sleeping 4000 millis and retrying...

2018-04-26 15:05:36,876 [parallel-3] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:192) - Processing 1 federation changes of type users

2018-04-26 15:05:36,880 [single-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:177) - An exception of type IllegalStateException occurred, sleeping 8000 millis and retrying...

2018-04-26 15:05:44,883 [parallel-4] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:192) - Processing 1 federation changes of type users

2018-04-26 15:05:44,886 [single-1] [JFrog-Access] [INFO ] (o.j.a.s.s.c.f.FederationServiceImpl:177) - An exception of type IllegalStateException occurred, sleeping 16000 millis and retrying...