Hi there
I have a cluster with 5 brokers, they have same hardware(40Core, 128G MEM, 36T DISK), JVM version(1.8.0_144) and start parameters there is one broker always have a long time STW while young gc, two or three times per day. I am not sure this issue caused by Kafka or JVM itself. Here is the GC log while the STW occured on the bottom of this mail?? take a look at the row 344206 , it says the size of eden space changed from 30G to 3G I want to figure out : Is this issue caused by my configuration of this broker? How can I fix it ? or may be I just need send this log to Oracle Thank you guys Best Wishes 344181 2020-05-08T22:46:52.657+0800: 994003.630: [GC pause (G1 Evacuation Pause) (young), 5.6019987 secs] 344182 [Parallel Time: 5594.0 ms, GC Workers: 28] 344183 [GC Worker Start (ms): Min: 994003629.7, Avg: 994003629.8, Max: 994003630.0, Diff: 0.3] 344184 [Ext Root Scanning (ms): Min: 0.3, Avg: 0.4, Max: 0.6, Diff: 0.4, Sum: 11.5] 344185 [Update RS (ms): Min: 1.9, Avg: 2.2, Max: 2.4, Diff: 0.6, Sum: 60.2] 344186 [Processed Buffers: Min: 3, Avg: 4.0, Max: 9, Diff: 6, Sum: 111] 344187 [Scan RS (ms): Min: 0.0, Avg: 0.1, Max: 0.3, Diff: 0.3, Sum: 3.3] 344188 [Code Root Scanning (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1] 344189 [Object Copy (ms): Min: 5463.1, Avg: 5484.2, Max: 5590.4, Diff: 127.3, Sum: 153558.5] 344190 [Termination (ms): Min: 0.0, Avg: 106.1, Max: 127.8, Diff: 127.8, Sum: 2971.9] 344191 [Termination Attempts: Min: 1, Avg: 1.4, Max: 2, Diff: 1, Sum: 39] 344192 [GC Worker Other (ms): Min: 0.0, Avg: 0.1, Max: 0.2, Diff: 0.2, Sum: 2.6] 344193 [GC Worker Total (ms): Min: 5592.9, Avg: 5593.1, Max: 5593.8, Diff: 0.9, Sum: 156608.2] 344194 [GC Worker End (ms): Min: 994009222.9, Avg: 994009223.0, Max: 994009223.6, Diff: 0.7] 344195 [Code Root Fixup: 0.1 ms] 344196 [Code Root Purge: 0.0 ms] 344197 [Clear CT: 3.0 ms] 344198 [Other: 4.9 ms] 344199 [Choose CSet: 0.0 ms] 344200 [Ref Proc: 2.4 ms] 344201 [Ref Enq: 0.1 ms] 344202 [Redirty Cards: 0.3 ms] 344203 [Humongous Register: 0.1 ms] 344204 [Humongous Reclaim: 0.0 ms] 344205 [Free CSet: 1.8 ms] 344206 [Eden: 30.4G(30.4G)->0.0B(3168.0M) Survivors: 128.0M->96.0M Heap: 50.6G(64.0G)->20.1G(64.0G)] 344207 [Times: user=0.00 sys=158.29, real=5.60 secs]
