Thank you Anthony. Eduardo Alonso Vía de las dos Castillas, 33, Ática 4, 3ª Planta 28224 Pozuelo de Alarcón, Madrid Tel: +34 91 828 6473 // www.stratio.com // *@stratiobd <https://twitter.com/StratioBD>*
2017-05-01 2:27 GMT+02:00 Anthony Grasso <anthony.gra...@gmail.com>: > Hi Eduardo, > > Please see my comment inline below regarding your third question. > > Regards, > Anthony > > On 28 April 2017 at 21:26, Eduardo Alonso <eduardoalo...@stratio.com> > wrote: > >> Hi to all: >> >> I am having some problems with two client's cassandra:3.0.8 clusters i >> want to share with you. These clusters are for QA and DEV. >> >> The cluster 1 (1 DC) is composed by 3 vm (heap=4G, RAM=8G) sharing the >> same physical machine and sharing one ssd. I know this is not the best >> environment but it is only for testing purposes. >> >> The entire cluster runs very slow and sometimes have some failing inserts >> causing saving hints and replaying them and some data inconsistency with 2i >> queries. >> >> I know it is not the best environment (virtual machines sharing physical >> machine and one physical disk) but it is very weird to me that just the >> same test case works like a charm in a 3 docker container inside my >> laptop(i7 16G ssd) but causes a lot of problems in their cluster. >> >> *listen_address* and *rpc_address* are set to external domain name (i. >> e: NODE_NAME.clientdomain.com). I have activated TRACE logs and get some >> strange messages >> >> So, my questions: >> >> *1.- It is posible that one node(with ) send a message to self triggering >> READ_REPAIR?* >> >> TRACE [SharedPool-Worker-1] 2017-04-24 08:58:28,558 >> MessagingService.java:750 - Message-to-self TYPE:MUTATION VERB: >> READ_REPAIR going over MessagingService >> >> TRACE [SharedPool-Worker-1] 2017-04-16 04:38:47,513 >> MessagingService.java:747 -01a.clientdomain.com/10.63.24.238 >> <http://qathcsdvm01c.ny3.corp.portware.net/10.63.24.238> sending >> READ_REPAIR to 3426@/10.63.24.238" >> >> *Does this log line shows one node asking itself for a portion of data >> that it has not? * >> >> *2.-* I have another suspicious log line about slow vms: >> >> -WARN [GossipTasks:1] 2017-04-14 00:32:44,371 FailureDetector.java:287 >> - Not marking nodes down due to local pause of 11195193520 > 5000000000 >> >> *Does this line says that there is a pause in JVM of 11 secs*? There is >> no garbage collector log lines. *Is it posible that this 11 secs pause >> is caused by a dns lookup of the domain?* >> >> >> *3.-* I know that listen_address must be the external IP (Inter node >> communications will be faster, no need to dns lookup) >> >> *If i set listen_address to external ip, is it necessary that ip be >> pingable from all the other datacenter nodes? * >> *Does inter-data-center communications use 'rpc_address' or >> 'listen_address'*? >> >> > All nodes in the cluster should be configured so that they can contact > each other. As far as being able to ping each other, enabling ICMP can be > useful for debugging inter communication problems. > > Regarding internode communication; the *listen_address* is used for > internode communication in the cluster. Note that if you don't want to > manually specify an IP to *listen_address* for each node in your cluster, > leave it blank and Cassandra will use *InetAddress.getLocalHost()* to > pick an address. > > >> Thank you in advance >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> Eduardo Alonso >> Vía de las dos Castillas, 33, Ática 4, 3ª Planta >> 28224 Pozuelo de Alarcón, Madrid >> Tel: +34 91 828 6473 <+34%20918%2028%2064%2073> // www.stratio.com // >> *@stratiobd >> <https://twitter.com/StratioBD>* >> > >
