Yonger created HADOOP-14770:
-------------------------------

             Summary: S3A http connection in s3a driver not reuse in Spark 
application
                 Key: HADOOP-14770
                 URL: https://issues.apache.org/jira/browse/HADOOP-14770
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Yonger


I print out connection stats every 2 s when running Spark application against 
s3-compatible storage:

ESTAB      0      0         ::ffff:10.0.2.36:44446                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44454                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44374                
::ffff:10.0.2.254:80                 
ESTAB      159724 0         ::ffff:10.0.2.36:44436                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44448                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44338                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44438                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44414                
::ffff:10.0.2.254:80                 
ESTAB      0      480       ::ffff:10.0.2.36:44450                
::ffff:10.0.2.254:80                  timer:(on,170ms,0)
ESTAB      0      0         ::ffff:10.0.2.36:44442                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44390                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44326                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44452                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44394                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44444                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44456                
::ffff:10.0.2.254:80                 
======================
ESTAB      0      0         ::ffff:10.0.2.36:44508                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44476                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44524                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44374                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44500                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44504                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44512                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44506                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44464                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44518                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44510                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44442                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44526                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44472                
::ffff:10.0.2.254:80                 
ESTAB      0      0         ::ffff:10.0.2.36:44466                
::ffff:10.0.2.254:80 

the connection in the above of "=" and below were changed all the time. But 
this haven't seen in MR application. 



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