Steps to reproduce..

1- Start server
   gio/tests/.libs/gdbus-example-peer --server --address unix:abstract=/tmp/peer/myaddr

2- Check the open fds for server process
   lsof -a -p 8253
..................
gdbus-exa 8253 imran    0u   CHR      136,1      0t0        4 /dev/pts/1
gdbus-exa 8253 imran    1u   CHR      136,1      0t0        4 /dev/pts/1
gdbus-exa 8253 imran    2u   CHR      136,1      0t0        4 /dev/pts/1
gdbus-exa 8253 imran    3u  0000        0,9        0     6602 anon_inode
gdbus-exa 8253 imran    4u  unix 0xf1005680      0t0   966830 @/tmp/peer/myaddr

3- Run the client 
   gio/tests/.libs/gdbus-example-peer --address unix:abstract=/tmp/peer/myaddr

4- Check the open fds for server process again
   lsof -a -p 8253
..................
gdbus-exa 8253 imran    0u   CHR      136,1      0t0        4 /dev/pts/1
gdbus-exa 8253 imran    1u   CHR      136,1      0t0        4 /dev/pts/1
gdbus-exa 8253 imran    2u   CHR      136,1      0t0        4 /dev/pts/1
gdbus-exa 8253 imran    3u  0000        0,9        0     6602 anon_inode
gdbus-exa 8253 imran    4u  unix 0xf1005680      0t0   966830 @/tmp/peer/myaddr
gdbus-exa 8253 imran    5u  unix 0xf1004280      0t0   965811 @/tmp/peer/myaddr
gdbus-exa 8253 imran    6u  0000        0,9        0     6602 anon_inode

5- Please note the fd '5u' which is created when client makes connection but even when the client goes down, the descriptor is still there..

Distro and Library version
==========================
- DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=14.04
  DISTRIB_CODENAME=trusty
  DISTRIB_DESCRIPTION="Ubuntu 14.04 LTS"
- Library version: libglib2.0-0: 2.40.0-2

Reproducible
============
- Always

Analysis
========
I have done some investigations and it seems that its related to GDbusWorker object which never gets disposed off. GDbusConnection object seems to be disposed off. It can be related to timings/race issue as when I add some logs the problem is not reproducible anymore.