ticsmtc6 commented on issue #1602: TIMEOUT_CLEAN_QUEUE, 
org.apache.rocketmq.store.ha.HAConnection.ReadSocketService#run 
this.selector.select(1000) cost 5000+ms
URL: https://github.com/apache/rocketmq/issues/1602#issuecomment-557359835
 
 
   @duhengforever  
   java -version
   java version "1.8.0_151"
   
   uname  -a
   Linux pro-ecs-rocketmq-3-66 3.10.0-693.2.2.el7.x86_64 #1 SMP Tue Sep 12 
22:26:13 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
   
   jvm confiuration:
    -Xms26g -Xmx26g -Xmn14g -XX:+UseG1GC -XX:G1HeapRegionSize=16m 
-XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 
-XX:SoftRefLRUPolicyMSPerMB=0 -XX:SurvivorRatio=8 -verbose:gc 
-Xloggc:/dev/shm/mq_gc_%p.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps 
-XX:+PrintGCApplicationStoppedTime -XX:+PrintAdaptiveSizePolicy 
-XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=30m 
-XX:-OmitStackTraceInFastThrow -XX:+AlwaysPreTouch -XX:MaxDirectMemorySize=50g 
-XX:-UseLargePages -XX:-UseBiasedLocking -XX:+PrintSafepointStatistics 
-XX:PrintSafepointStatisticsCount=1
   
   gc log:
   2019-11-21T18:05:00.909+0800: 1655.004: Total time for which application 
threads were stopped: 0.0006644 seconds, Stopping threads took: 0.0001931 
seconds
   2019-11-21T18:05:08.486+0800: 1662.581: Total time for which application 
threads were stopped: 5.9630721 seconds, Stopping threads took: 0.0001196 
seconds
   2019-11-21T18:05:08.487+0800: 1662.582: Total time for which application 
threads were stopped: 0.0006973 seconds, Stopping threads took: 0.0001753 
seconds
   2019-11-21T18:05:08.487+0800: 1662.582: Total time for which application 
threads were stopped: 0.0005689 seconds, Stopping threads took: 0.0001733 
seconds
   2019-11-21T18:05:08.510+0800: 1662.606: [GC pause (G1 Evacuation Pause) 
(young) 1662.606: [G1Ergonomics (CSet Construction) start choosing CSet, 
_pending_cards: 0, predicted base time: 10.72 ms, remaining time: 189.28 ms, 
target pause time: 200.00 ms]
    1662.606: [G1Ergonomics (CSet Construction) add young regions to CSet, 
eden: 893 regions, survivors: 3 regions, predicted young region time: 8427.79 
ms]
    1662.606: [G1Ergonomics (CSet Construction) finish choosing CSet, eden: 893 
regions, survivors: 3 regions, old: 0 regions, predicted pause time: 8438.51 
ms, target pause time: 200.00 ms]
    1662.636: [G1Ergonomics (Mixed GCs) do not start mixed GCs, reason: 
candidate old regions not available]
   , 0.0305605 secs]
      [Parallel Time: 23.1 ms, GC Workers: 8]
         [GC Worker Start (ms): Min: 1662606.0, Avg: 1662610.2, Max: 1662625.2, 
Diff: 19.2]
         [Ext Root Scanning (ms): Min: 0.0, Avg: 0.6, Max: 1.9, Diff: 1.8, Sum: 
4.9]
         [Update RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
            [Processed Buffers: Min: 0, Avg: 0.0, Max: 0, Diff: 0, Sum: 0]
         [Scan RS (ms): Min: 0.1, Avg: 0.2, Max: 0.5, Diff: 0.4, Sum: 1.6]
         [Code Root Scanning (ms): Min: 0.0, Avg: 0.8, Max: 5.9, Diff: 5.9, 
Sum: 6.4]
         [Object Copy (ms): Min: 1.1, Avg: 15.0, Max: 21.2, Diff: 20.1, Sum: 
119.7]
         [Termination (ms): Min: 0.0, Avg: 2.1, Max: 2.4, Diff: 2.4, Sum: 16.9]
            [Termination Attempts: Min: 1, Avg: 2.1, Max: 3, Diff: 2, Sum: 17]
         [GC Worker Other (ms): Min: 0.0, Avg: 0.0, Max: 0.1, Diff: 0.0, Sum: 
0.3]
         [GC Worker Total (ms): Min: 3.7, Avg: 18.7, Max: 22.9, Diff: 19.2, 
Sum: 149.8]
         [GC Worker End (ms): Min: 1662628.9, Avg: 1662628.9, Max: 1662629.0, 
Diff: 0.1]
      [Code Root Fixup: 1.7 ms]
      [Code Root Purge: 0.0 ms]
      [Clear CT: 1.2 ms]
      [Other: 4.5 ms]
         [Choose CSet: 0.0 ms]
         [Ref Proc: 2.3 ms]
         [Ref Enq: 0.1 ms]
         [Redirty Cards: 0.2 ms]
         [Humongous Register: 0.1 ms]
         [Humongous Reclaim: 0.0 ms]
         [Free CSet: 1.3 ms]
      [Eden: 14.0G(14.0G)->0.0B(13.9G) Survivors: 48.0M->80.0M Heap: 
14.0G(26.0G)->67.6M(26.0G)]
    [Times: user=0.16 sys=0.00, real=0.03 secs] 
   2019-11-21T18:05:08.541+0800: 1662.636: Total time for which application 
threads were stopped: 0.0319419 seconds, Stopping threads took: 0.0007202 
seconds
   
   Corresponding safepoint log:
   1655.004: no vm operation                  [     192          0              
0    ]      [     0     0     0     0     0    ]  0   
            vmop                    [threads: total initially_running 
wait_to_block]    [time: spin block sync cleanup vmop] page_trap_count
   1656.618: PrintThreads                     [     192          0              
0    ]      [     0     0     0     0  5962    ]  0   
            vmop                    [threads: total initially_running 
wait_to_block]    [time: spin block sync cleanup vmop] page_trap_count
   1662.581: PrintJNI                         [     192          0              
0    ]      [     0     0     0     0     0    ]  0   
            vmop                    [threads: total initially_running 
wait_to_block]    [time: spin block sync cleanup vmop] page_trap_count
   1662.582: FindDeadlocks                    [     192          0              
1    ]      [     0     0     0     0     0    ]  0   
            vmop                    [threads: total initially_running 
wait_to_block]    [time: spin block sync cleanup vmop] page_trap_count
   1662.604: G1IncCollectionPause             [     192          2              
1    ]      [     0     0     0     0    30    ]  1   

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