On Fri, Feb 15, 2019 at 12:21 PM Christopher Schultz < ch...@christopherschultz.net> wrote:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Herb, > > On 2/14/19 12:41, Herb Burnswell wrote: > > Tomcat 8.5.23 RHEL 7.5 > > > > We are looking to set up session management via Redisson to offload > > the CPU consumption of using Tomcat's built in clustering session > > management. We have CPU licensing limits and need to conserve as > > much CPU as possible. > > Dumb question: aren't you just going to move the CPU cycles to another > system? > Thanks for the reply. Short answer, yes. But that is the idea. We can only use 2 CPU's per application node (3 nodes) with our licensing structure so we do not want to take cycles away from the application to manage sessions. > Another dumb question: do you actually need clustering? > If I'm using the term correctly, yes. The idea would be for HA functionality; If users were connected to node 3 and the node failed for some reason, their session would be picked up by node 1 or 2 uninterrupted. Sorry if I confused the intent. > > > I have never set up a configuration this way, however I have Redis > > set up and running as 1 Master, 1 Slave. I seemingly just need to > > point our application to it. I have read this doc on how to: > > > > https://github.com/redisson/redisson/tree/master/redisson-tomcat > > > > It seems pretty straight forward except for the redisson.conf > > configuration: > > > > Add RedissonSessionManager into tomcat/conf/context.xml > > > > <Manager className="org.redisson.tomcat.RedissonSessionManager" > > configPath="${catalina.base}/redisson.conf" readMode="REDIS" > > updateMode="DEFAULT"/> > > I would do this in the application's context.xml file instead of the > global/default one. That means modifying the application's > META-INF/context.xml file, or, if you deploy via files from outside > your WAR/dir application, then conf/[engine]/[hostname]/[appname].xml. > Yes, this is requiring the editing a application specific xml file. > > > I am more familiar with YAML so plan on configuring the > > redisson.conf as such. I have read the referenced configuration > > wiki page: > > > > https://github.com/redisson/redisson/wiki/2.-Configuration > > > > However, it has a great deal of options and I'm not sure what is > > and is not needed. > > > > I am reaching out here on the Tomcat user group to see if anyone > > else is using Redisson for session management and if maybe I can > > get some guidance on a basic redisson.conf configuration. I'd also > > be interested in comments on if there are better options or things > > to watch out for. > > I don't have any experience with either Redis or Redisson, but what is > wrong with the default/sample configuration you have provided above? > I have through much trial and error been using this config: { "masterSlaveServersConfig":{ "idleConnectionTimeout":10000, "connectTimeout":10000, "timeout":3000, "retryAttempts":3, "retryInterval":1500, "failedSlaveReconnectionInterval":3000, "failedSlaveCheckInterval":60000, "password":"<master_pass>", "subscriptionsPerConnection":5, "clientName":true, "subscriptionConnectionMinimumIdleSize":1, "subscriptionConnectionPoolSize":50, "slaveConnectionMinimumIdleSize":32, "slaveConnectionPoolSize":64, "masterConnectionMinimumIdleSize":32, "masterConnectionPoolSize":64, "readMode":"SLAVE", "subscriptionMode":"SLAVE", "slaveAddresses":[ "<slave.example.com:6379" ], "masterAddress":"<master.example.com>:6379", "database":0 }, "threads":0, "nettyThreads":0, "transportMode":"NIO" } However, I am getting a couple exceptions and am not sure what might be the issue: INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | Feb 18, 2019 10:09:33 AM org.apache.catalina.core.StandardContext startInternal INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | SEVERE: The session manager failed to start INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | org.apache.catalina.LifecycleException: Failed to start component [org.redisson.tomcat.RedissonSessionManager[]] INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5224) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at java.util.concurrent.FutureTask.run(FutureTask.java:266) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at java.lang.Thread.run(Thread.java:748) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | Caused by: org.apache.catalina.LifecycleException: java.lang.NullPointerException INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.tomcat.RedissonSessionManager.buildClient(RedissonSessionManager.java:279) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.tomcat.RedissonSessionManager.startInternal(RedissonSessionManager.java:209) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | ... 8 more INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | Caused by: java.lang.NullPointerException INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at io.netty.util.NetUtil.isValidIpV4Address(NetUtil.java:648) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at io.netty.util.NetUtil.createByteArrayFromIpAddressString(NetUtil.java:368) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.client.RedisClient.resolveAddr(RedisClient.java:172) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.connection.MasterSlaveEntry.addSlave(MasterSlaveEntry.java:303) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.connection.MasterSlaveEntry.addSlave(MasterSlaveEntry.java:345) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.connection.MasterSlaveEntry.initSlaveBalancer(MasterSlaveEntry.java:102) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.connection.MasterSlaveConnectionManager.createMasterSlaveEntry(MasterSlaveConnectionManager.java:372) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.connection.MasterSlaveConnectionManager.initSingleEntry(MasterSlaveConnectionManager.java:346) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.connection.MasterSlaveConnectionManager.<init>(MasterSlaveConnectionManager.java:161) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.config.ConfigSupport.createConnectionManager(ConfigSupport.java:225) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.Redisson.<init>(Redisson.java:121) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.Redisson.create(Redisson.java:164) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | at org.redisson.tomcat.RedissonSessionManager.buildClient(RedissonSessionManager.java:277) INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | ... 10 more INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | Feb 18, 2019 10:09:33 AM org.apache.catalina.core.StandardContext startInternal INFO | jvm 1 | main | 2019/02/18 10:09:33.068 | SEVERE: Context [] startup failed due to previous errors > > - -chris > -----BEGIN PGP SIGNATURE----- > Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ > > iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAlxnHysACgkQHPApP6U8 > pFhkyRAAhq0Rw6laOS4mUAgtjWhCW8tvsrfvWmUtQKu0TTmdDuoL1OUEYBiAl45l > TBF7sxjtd8Olk9gEqGdzD9srZUF1y9/ajzok4KGZrfDEHKnoqoXPQaRFTT7tWpH6 > 76uOj2KHzaTdgtz6qVdGdJKJ97VY0pMy/+4AMPwO/I3tygah1MfIGqKjbJ1zZr0O > ZT0CRBgRb2pUn5nZTtXyozL0J+3MIRGPC35il86Wb+Wkjw4ks3S+gxTe3Cl7MCO7 > wfu8WAI+gKEapdC0Aj9esu/HueYMGgdj3GYvTJCivqg9TGtPpgMaEe09o1VjfMmV > JZu4aCjaDq82ZxLlIKFLKkDhlgYhFhnLVYXN1H+2SdITabprpWw+KDdx55jVE3yt > W+ZQR/dFqDVvp5uKU1u/2BZACjXn3bRrkvif4bKQJuWpFBoXT6fBJ/37eYuiS58n > 7omBRJoGzpcKCOjij1GhwtePKibo9EBm+r/RsGZnxTQHnHKslCwp+TcS5nZFmw9H > Y1O0jtIyhcMp7o1mAsuErKK6OSu7bREe+4NrgwJ7OCSXU42keU/fXK2Z8u/MAJE1 > uRDyqSk+VbNxP+MCbShr89QD6XVAFoKnVk5QDdEiUZ5asxCbhl5UADNi9P3Nzasr > fK7ae3S8kD98k1P2OvguPqnwbUpHd7tVrlwOrs/8LF8w+PeSJWU= > =XhoF > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
