Re: cassandra node jvm stall intermittently
heh on the midst of upgrading , Rob ;-) Jason On Tue, Mar 10, 2015 at 2:04 AM, Robert Coli rc...@eventbrite.com wrote: On Sat, Mar 7, 2015 at 1:44 AM, Jason Wee peich...@gmail.com wrote: hey Ali, 1.0.8 On Sat, Mar 7, 2015 at 5:20 PM, Ali Akhtar ali.rac...@gmail.com wrote: What version are you running? Upgrade your very old version to at least 1.2.x (via 1.1.x) ASAP. =Rob
Re: cassandra node jvm stall intermittently
Hi Jan, thanks for your time to prepare the question and answer below, - How many nodes do you have on the ring ? 12 - What is the activity when this occurs - reads / writes/ compactions ? This cluster has a lot of writes and read. off peak period, ops center shown cluster write is about 5k/sec, read about 1k/sec and during peak period, write could be 22k/sec and read about 10k/sec. So this particular one node hang like every moment irrespect if it is peak or non peak, or compaction. - Is there anything that is unique about this node that makes it different from the other nodes ? Our nodes are same in term of operating system (centos 6) and cassandra configuration settings. Other than that, there are no other resources intensive application running in cassandra nodes. - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. it *always* happened and in fact, it is happening now. - What is the load distribution the ring (ie: is this node carrying more load than the others). As of this moment, - Address DC RackStatus State Load OwnsToken - 155962751505430129087380028406227096910 - node1 us-east 1e Up Normal 498.66 GB 8.33% 0 - node2 us-east 1e Up Normal 503.36 GB 8.33% 14178431955039102644307275309657008810 - node3 us-east 1e Up Normal 492.08 GB 8.33% 28356863910078205288614550619314017619 - node4 us-east 1e Up Normal 499.54 GB 8.33% 42535295865117307932921825928971026430 - node5 us-east 1e Up Normal 523.76 GB 8.33% 56713727820156407428984779325531226109 - node6 us-east 1e Up Normal 515.36 GB 8.33% 70892159775195513221536376548285044050 - node7 us-east 1e Up Normal 588.93 GB 8.33% 85070591730234615865843651857942052860 - node8 us-east 1e Up Normal 498.51 GB 8.33% 99249023685273718510150927167599061670 - node9 us-east 1e Up Normal 531.81 GB 8.33% 113427455640312814857969558651062452221 - node10 us-east 1e Up Normal 501.85 GB 8.33% 127605887595351923798765477786913079290 - node11 us-east 1e Up Normal 501.13 GB 8.33% 141784319550391026443072753096570088100 - node12 us-east 1e Up Normal 508.45 GB 8.33% 155962751505430129087380028406227096910 so that one node is node5. At this instance ring output, yea, it is second highest in the ring but unlikely this is the cause. Jason On Sat, Mar 7, 2015 at 3:35 PM, Jan cne...@yahoo.com wrote: HI Jason; The single node showing the anomaly is a hint that the problem is probably local to a node (as you suspected). - How many nodes do you have on the ring ? - What is the activity when this occurs - reads / writes/ compactions ? - Is there anything that is unique about this node that makes it different from the other nodes ? - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. - What is the load distribution the ring (ie: is this node carrying more load than the others). The system.log should have more info.,about it. hope this helps Jan/ On Friday, March 6, 2015 4:50 AM, Jason Wee peich...@gmail.com wrote: well, StatusLogger.java started shown in cassandra system.log, MessagingService.java also shown some stage (e.g. read, mutation) dropped. It's strange it only happen in this node but this type of message does not shown in other node log file at the same time... Jason On Thu, Mar 5, 2015 at 4:26 AM, Jan cne...@yahoo.com wrote: HI Jason; Whats in the log files at the moment jstat shows 100%. What is the activity on the cluster the node at the specific point in time (reads/ writes/ joins etc) Jan/ On Wednesday, March 4, 2015 5:59 AM, Jason Wee peich...@gmail.com wrote: Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07
Re: cassandra node jvm stall intermittently
hey Ali, 1.0.8 On Sat, Mar 7, 2015 at 5:20 PM, Ali Akhtar ali.rac...@gmail.com wrote: What version are you running? On Sat, Mar 7, 2015 at 2:14 PM, Jason Wee peich...@gmail.com wrote: Hi Jan, thanks for your time to prepare the question and answer below, - How many nodes do you have on the ring ? 12 - What is the activity when this occurs - reads / writes/ compactions ? This cluster has a lot of writes and read. off peak period, ops center shown cluster write is about 5k/sec, read about 1k/sec and during peak period, write could be 22k/sec and read about 10k/sec. So this particular one node hang like every moment irrespect if it is peak or non peak, or compaction. - Is there anything that is unique about this node that makes it different from the other nodes ? Our nodes are same in term of operating system (centos 6) and cassandra configuration settings. Other than that, there are no other resources intensive application running in cassandra nodes. - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. it *always* happened and in fact, it is happening now. - What is the load distribution the ring (ie: is this node carrying more load than the others). As of this moment, - Address DC RackStatus State Load OwnsToken - 155962751505430129087380028406227096910 - node1 us-east 1e Up Normal 498.66 GB 8.33% 0 - node2 us-east 1e Up Normal 503.36 GB 8.33% 14178431955039102644307275309657008810 - node3 us-east 1e Up Normal 492.08 GB 8.33% 28356863910078205288614550619314017619 - node4 us-east 1e Up Normal 499.54 GB 8.33% 42535295865117307932921825928971026430 - node5 us-east 1e Up Normal 523.76 GB 8.33% 56713727820156407428984779325531226109 - node6 us-east 1e Up Normal 515.36 GB 8.33% 70892159775195513221536376548285044050 - node7 us-east 1e Up Normal 588.93 GB 8.33% 85070591730234615865843651857942052860 - node8 us-east 1e Up Normal 498.51 GB 8.33% 99249023685273718510150927167599061670 - node9 us-east 1e Up Normal 531.81 GB 8.33% 113427455640312814857969558651062452221 - node10 us-east 1e Up Normal 501.85 GB 8.33% 127605887595351923798765477786913079290 - node11 us-east 1e Up Normal 501.13 GB 8.33% 141784319550391026443072753096570088100 - node12 us-east 1e Up Normal 508.45 GB 8.33% 155962751505430129087380028406227096910 so that one node is node5. At this instance ring output, yea, it is second highest in the ring but unlikely this is the cause. Jason On Sat, Mar 7, 2015 at 3:35 PM, Jan cne...@yahoo.com wrote: HI Jason; The single node showing the anomaly is a hint that the problem is probably local to a node (as you suspected). - How many nodes do you have on the ring ? - What is the activity when this occurs - reads / writes/ compactions ? - Is there anything that is unique about this node that makes it different from the other nodes ? - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. - What is the load distribution the ring (ie: is this node carrying more load than the others). The system.log should have more info.,about it. hope this helps Jan/ On Friday, March 6, 2015 4:50 AM, Jason Wee peich...@gmail.com wrote: well, StatusLogger.java started shown in cassandra system.log, MessagingService.java also shown some stage (e.g. read, mutation) dropped. It's strange it only happen in this node but this type of message does not shown in other node log file at the same time... Jason On Thu, Mar 5, 2015 at 4:26 AM, Jan cne...@yahoo.com wrote: HI Jason; Whats in the log files at the moment jstat shows 100%. What is the activity on the cluster the node at the specific point in time (reads/ writes/ joins etc) Jan/ On Wednesday, March 4, 2015 5:59 AM, Jason Wee peich...@gmail.com wrote: Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78
Re: cassandra node jvm stall intermittently
What version are you running? On Sat, Mar 7, 2015 at 2:14 PM, Jason Wee peich...@gmail.com wrote: Hi Jan, thanks for your time to prepare the question and answer below, - How many nodes do you have on the ring ? 12 - What is the activity when this occurs - reads / writes/ compactions ? This cluster has a lot of writes and read. off peak period, ops center shown cluster write is about 5k/sec, read about 1k/sec and during peak period, write could be 22k/sec and read about 10k/sec. So this particular one node hang like every moment irrespect if it is peak or non peak, or compaction. - Is there anything that is unique about this node that makes it different from the other nodes ? Our nodes are same in term of operating system (centos 6) and cassandra configuration settings. Other than that, there are no other resources intensive application running in cassandra nodes. - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. it *always* happened and in fact, it is happening now. - What is the load distribution the ring (ie: is this node carrying more load than the others). As of this moment, - Address DC RackStatus State Load OwnsToken - 155962751505430129087380028406227096910 - node1 us-east 1e Up Normal 498.66 GB 8.33% 0 - node2 us-east 1e Up Normal 503.36 GB 8.33% 14178431955039102644307275309657008810 - node3 us-east 1e Up Normal 492.08 GB 8.33% 28356863910078205288614550619314017619 - node4 us-east 1e Up Normal 499.54 GB 8.33% 42535295865117307932921825928971026430 - node5 us-east 1e Up Normal 523.76 GB 8.33% 56713727820156407428984779325531226109 - node6 us-east 1e Up Normal 515.36 GB 8.33% 70892159775195513221536376548285044050 - node7 us-east 1e Up Normal 588.93 GB 8.33% 85070591730234615865843651857942052860 - node8 us-east 1e Up Normal 498.51 GB 8.33% 99249023685273718510150927167599061670 - node9 us-east 1e Up Normal 531.81 GB 8.33% 113427455640312814857969558651062452221 - node10 us-east 1e Up Normal 501.85 GB 8.33% 127605887595351923798765477786913079290 - node11 us-east 1e Up Normal 501.13 GB 8.33% 141784319550391026443072753096570088100 - node12 us-east 1e Up Normal 508.45 GB 8.33% 155962751505430129087380028406227096910 so that one node is node5. At this instance ring output, yea, it is second highest in the ring but unlikely this is the cause. Jason On Sat, Mar 7, 2015 at 3:35 PM, Jan cne...@yahoo.com wrote: HI Jason; The single node showing the anomaly is a hint that the problem is probably local to a node (as you suspected). - How many nodes do you have on the ring ? - What is the activity when this occurs - reads / writes/ compactions ? - Is there anything that is unique about this node that makes it different from the other nodes ? - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. - What is the load distribution the ring (ie: is this node carrying more load than the others). The system.log should have more info.,about it. hope this helps Jan/ On Friday, March 6, 2015 4:50 AM, Jason Wee peich...@gmail.com wrote: well, StatusLogger.java started shown in cassandra system.log, MessagingService.java also shown some stage (e.g. read, mutation) dropped. It's strange it only happen in this node but this type of message does not shown in other node log file at the same time... Jason On Thu, Mar 5, 2015 at 4:26 AM, Jan cne...@yahoo.com wrote: HI Jason; Whats in the log files at the moment jstat shows 100%. What is the activity on the cluster the node at the specific point in time (reads/ writes/ joins etc) Jan/ On Wednesday, March 4, 2015 5:59 AM, Jason Wee peich...@gmail.com wrote: Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94
Re: cassandra node jvm stall intermittently
well, StatusLogger.java started shown in cassandra system.log, MessagingService.java also shown some stage (e.g. read, mutation) dropped. It's strange it only happen in this node but this type of message does not shown in other node log file at the same time... Jason On Thu, Mar 5, 2015 at 4:26 AM, Jan cne...@yahoo.com wrote: HI Jason; Whats in the log files at the moment jstat shows 100%. What is the activity on the cluster the node at the specific point in time (reads/ writes/ joins etc) Jan/ On Wednesday, March 4, 2015 5:59 AM, Jason Wee peich...@gmail.com wrote: Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 4.65 29.66 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 70.88 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 71.58 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 72.15 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 72.33 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 72.73 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.20 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.71 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.84 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.91 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.18 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 5.43 12.64 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534
Re: cassandra node jvm stall intermittently
HI Jason; The single node showing the anomaly is a hint that the problem is probably local to a node (as you suspected). - How many nodes do you have on the ring ? - What is the activity when this occurs - reads / writes/ compactions ? - Is there anything that is unique about this node that makes it different from the other nodes ? - Is this a periodic occurance OR a single occurence - I am trying to determine a pattern about when this shows up. - What is the load distribution the ring (ie: is this node carrying more load than the others). The system.log should have more info., about it. hope this helpsJan/ On Friday, March 6, 2015 4:50 AM, Jason Wee peich...@gmail.com wrote: well, StatusLogger.java started shown in cassandra system.log, MessagingService.java also shown some stage (e.g. read, mutation) dropped. It's strange it only happen in this node but this type of message does not shown in other node log file at the same time... Jason On Thu, Mar 5, 2015 at 4:26 AM, Jan cne...@yahoo.com wrote: HI Jason; Whats in the log files at the moment jstat shows 100%. What is the activity on the cluster the node at the specific point in time (reads/ writes/ joins etc) Jan/ On Wednesday, March 4, 2015 5:59 AM, Jason Wee peich...@gmail.com wrote: Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 4.65 29.66 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 70.88 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 71.58 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 72.15 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 72.33 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 72.73 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.20 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.71 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.84 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.91 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.18 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 5.43 12.64 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43
Re: cassandra node jvm stall intermittently
HI Jason; Whats in the log files at the moment jstat shows 100%. What is the activity on the cluster the node at the specific point in time (reads/ writes/ joins etc) Jan/ On Wednesday, March 4, 2015 5:59 AM, Jason Wee peich...@gmail.com wrote: Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 4 0.056 73.493 0.00 4.65 29.66 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 70.88 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 71.58 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 72.15 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 72.33 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 72.73 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.20 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.71 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.84 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 73.91 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.18 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 4 0.056 73.544 0.00 5.43 12.64 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 69.24 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 78.05 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 78.97 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 79.07 71.09 60.07 2661 73.534 4 0.056 73.590 0.00 5.43 79.18 71.09 60.07 2661 73.534 4 0.056
cassandra node jvm stall intermittently
Hi, our cassandra node using java 7 update 72 and we ran jstat on one of the node, and notice some strange behaviour as indicated by output below. any idea why when eden space stay the same for few seconds like 100% and 18.02% for few seconds? we suspect such stalling cause timeout to our cluster. any idea what happened, what went wrong and what could cause this? $ jstat -gcutil 32276 1s 0.00 5.78 91.21 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 5.78 100.00 70.94 60.07 2657 73.437 40.056 73.493 0.00 4.65 29.66 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 70.88 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 71.58 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 72.15 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 72.33 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 72.73 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.20 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.71 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.84 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 73.91 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.18 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 4.65 74.29 71.00 60.07 2659 73.488 40.056 73.544 0.00 5.43 12.64 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 18.02 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 69.24 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 78.05 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 78.97 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 79.07 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 79.18 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 80.09 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 80.36 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 80.51 71.09 60.07 2661 73.534 40.056 73.590 0.00 5.43 80.70 71.09
