[Fixed] RabbitMQ使用過程中出現java.net.SocketException: Connection reset

# 檢查 max number of open files
ulimit -a
ulimit -n

###################################################
#                Sample output                    #
###################################################
#  core file size          (blocks, -c) 0
#  data seg size           (kbytes, -d) unlimited
#  scheduling priority             (-e) 0
#  file size               (blocks, -f) unlimited
#  pending signals                 (-i) 40960
#  max locked memory       (kbytes, -l) 32
#  max memory size         (kbytes, -m) unlimited
#  open files                      (-n) 4096
#  pipe size            (512 bytes, -p) 8
#  POSIX message queues     (bytes, -q) 819200
#  real-time priority              (-r) 0
#  stack size              (kbytes, -s) 10240
#  cpu time               (seconds, -t) unlimited
#  max user processes              (-u) 40960
#  virtual memory          (kbytes, -v) unlimited
#  file locks                      (-x) unlimited

# 更進一步，可以檢查soft limit跟hard limit
ulimit -Sn
ulimit -Hn

# 當發現 open files (-n) 設定的數字太少，把它調高一點
ulimit -n 65535

# 接著，重開出問題的服務
service rabbitmq-server restart

Reference: geardnico