hi all
when we run the
netstat -nape | grep -i close
on the ambari server machine , we see many CLOSE_WAIT
the pid - 1998 represented the YARN
and pid 8344 - represented the mapred
netstat -nape | grep -i close
tcp 1 0 197.23.12.36:42977 197.23.12.68:50010 CLOSE_WAIT 1013 30780754 8344/java
tcp 1 0 197.23.12.36:43148 197.23.12.62:50010 CLOSE_WAIT 1013 30778553 8344/java
tcp 1 0 197.23.12.36:42959 197.23.12.68:50010 CLOSE_WAIT 1013 30759752 8344/java
tcp6 1 0 197.23.12.36:36606 197.23.12.35:8188 CLOSE_WAIT 1011 524012 1998/java
tcp6 1 0 197.23.12.36:36592 197.23.12.35:8188 CLOSE_WAIT 1011 526356 1998/java
tcp6 1 0 197.23.12.36:36591 197.23.12.35:8188 CLOSE_WAIT 1011 517442 1998/java
tcp6 1 0 197.23.12.36:36579 197.23.12.35:8188 CLOSE_WAIT 1011 520633 1998/java
tcp6 1 0 197.23.12.36:52152 197.23.12.35:8188 CLOSE_WAIT 1011 562004 1998/java
tcp6 1 0 197.23.12.36:36588 197.23.12.35:8188 CLOSE_WAIT 1011 522512 1998/java
tcp6 1 0 197.23.12.36:36584 197.23.12.35:8188 CLOSE_WAIT 1011 520634 1998/java
tcp6 1 0 197.23.12.36:36590 197.23.12.35:8188 CLOSE_WAIT 1011 522513 1998/java
tcp6 1 0 197.23.12.36:36589 197.23.12.35:8188 CLOSE_WAIT 1011 511322 1998/java
tcp6 1 0 197.23.12.36:36586 197.23.12.35:8188 CLOSE_WAIT 1011 511321 1998/java
tcp6 1 0 197.23.12.36:36607 197.23.12.35:8188 CLOSE_WAIT 1011 520635 1998/java
tcp6 1 0 197.23.12.36:36602 197.23.12.35:8188 CLOSE_WAIT 1011 526357 1998/java
tcp6 1 0 197.23.12.36:36587 197.23.12.35:8188 CLOSE_WAIT 1011 524009 1998/java
tcp6 1 0 197.23.12.36:36593 197.23.12.35:8188 CLOSE_WAIT 1011 524010 1998/java
tcp6 1 0 197.23.12.36:36603 197.23.12.35:8188 CLOSE_WAIT 1011 522137 1998/java
my question , how we can avoid this CLOSE_WAIT ? on our ambari server ?
more details
197.23.12.36 - is the mabari server ( master2 )
197.23.12.35 - is the master1 machine
On master1/master2 - we have the active/standby resource manager
and App Timeline Server on master1
* just note , I guess if we restart the YARN or the mapred , then CLOSE_WAIT will gone , but this isn't solution , and we checked also the free memory and it is ok on the ambari server
Michael-Bronson
