Server problem 3.3.0 with connection manager - queued nio events increased

i use openfire together with currently one connection manager, the gateway plugin and custom plugin that intercepts some messages. all user are connecting trough the connection manager.

now i had a problem where now user was able to connect. i saw the request on connection manager, but the server didn’'t response.

also the session list didn’'t change on the server.

i didn’'t get an error/info/warning in the errorlog of both.

server load was normal, very low. so no endless loop.

the connection manager still got presence messages from the server (gateway users).

i only found these from the statslogger ?

1181154822250,5,15,5,0,17,1,0,551840,28,113059,1306868,0,0

1181155122250,5,15,5,0,17,1,0,551840,28,113107,1307349,155,0

1181155422250,5,15,5,0,17,1,0,551840,28,113107,1307394,335,0

1181155722250,5,15,5,0,17,1,0,551840,28,113107,1307438,479,0

1181156022249,5,15,5,0,17,1,0,551840,28,113107,1307473,605,0

1181156322250,5,15,5,0,17,1,0,551840,28,113107,1307592,844,0

1181156622249,5,15,5,0,17,1,0,551840,28,113107,1307622,965,0

1181156922256,5,15,5,0,17,1,0,551840,28,113107,1307673,1114,0

1181157222250,5,15,5,0,17,1,0,551840,28,113107,1307727,1300,0

1181157522250,5,15,5,0,17,1,0,551840,28,113107,1307792,1456,0

1181157822251,5,15,5,0,17,1,0,551840,28,113107,1307826,1554,0

1181158122250,5,15,5,0,17,1,0,551840,28,113107,1310153,4651,0

1181158422250,5,15,5,0,17,1,0,552190,39,113107,1310527,5249,0

1181158722250,5,15,5,0,17,1,0,552657,43,113289,1311515,0,0

from the readme i found this:

  1. Queued NIO events - Current number of stanzas that are queued. Stanzas are queued when the same client sends many stanzas and the server is still processing a previous stanza. Queued stanzas are not yet considered read.

1.) i tried to restart the plugin, but it didn’'t change anything.

2.) i tried to connect direct to the server - worked.

3.) i restartet the connection manager, now connection worked again, but old sessions are still alive on the server.

anybody has hints for me what can be the problem ?