Ok, so does it work now? -Flavio
On Tuesday, September 16, 2014 11:57 AM, lalit jangra <[email protected]> wrote: > > >Thanks Flavio, > >I have two agents which produce multiple threads to index content in >ManifoldCF.For 'Too many connections' i updated maxClientCnxns=0 in zoo.cfg in >all nodes after which i could not see this error. Previously it was >maxClientCnxns=60. > >I have passed connection string i have put below configurations in ManifoldCF >proerty file. > > ><property name="org.apache.manifoldcf.lockmanagerclass" >value="org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager"/> > <property name="org.apache.manifoldcf.zookeeper.connectstring" > value="iwdc1preecma03:2181,iwdc1preecma03:2182,iwdc1preecma03:2183,iwdc2preecma04:2181,iwdc2preecma04:2182"/> <property name="org.apache.manifoldcf. >zookeeper.sessiontimeout" value="3000"/> >Regards. > > > >On Tue, Sep 16, 2014 at 4:15 PM, Flavio Junqueira ><[email protected]> wrote: > >There are applications level errors when trying to create those znodes. >However, the important one at this point seems to be this one: >> >>2014-09-16 10:37:58,073 [myid:5] - WARN [NIOServerCxn.Factory: >>0.0.0.0/0.0.0.0:2182:NIOServerCnxnFactory@193] - Too many connections from / >>10.231.72.24 - max is 60 >> >> >>Do you have many clients or are you inadvertently creating too many handles? >>Also, you need to make sure that you're passing a connect string with all >>servers so that you balance client connections across servers. >> >>-Flavio >> >> >> >> >>On Tuesday, September 16, 2014 11:38 AM, lalit jangra >><[email protected]> wrote: >> >> >>> >>> >>>Hello Flavio, >>> >> >>>Below are snapshot from logs i can see. I could see multiple errors while >>>zookeeper is running. >>> >>> >>>2014-09-16 10:56:50,078 [myid:3] - INFO [ProcessThread(sid:3 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x3487ddf57dd004f type:create cxid:0x1080 >>>zxid:0xd0000a3ab txntype:-1 reqpath:n/a Error >>>Path:/org.apache.manifoldcf.locks-Solr:3F512EBFCFCC30070AC6A034726530577B7712B9 >>>Error:KeeperErrorCode = NoNode for >>>/org.apache.manifoldcf.locks-Solr:3F512EBFCFCC30070AC6A034726530577B7712B9 >>> >>>2014-09-16 10:56:50,120 [myid:3] - INFO [ProcessThread(sid:3 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x3487ddf57dd0071 type:create cxid:0x79e >>>zxid:0xd0000a3b8 txntype:-1 reqpath:n/a Error >>>Path:/org.apache.manifoldcf.locks-Solr:7FE7720ABD4211729605B45374AA3FE87A0E379E >>>Error:KeeperErrorCode = NoNode for >>>/org.apache.manifoldcf.locks-Solr:7FE7720ABD4211729605B45374AA3FE87A0E379E >>> >>>2014-09-16 10:56:50,154 [myid:3] - INFO [ProcessThread(sid:3 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x3487ddf57dd0054 type:create cxid:0xaa >>>zxid:0xd0000a3c8 txntype:-1 reqpath:n/a Error Path:/or >>> >>> >>>2014-09-16 10:37:57,590 [myid:5] - INFO [ProcessThread(sid:5 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x1487dce96820026 type:create cxid:0x2fb >>>zxid:0xb00000864 txntype:-1 reqpath:n/a Error >>>Path:/org.apache.manifoldcf.locks-Solr:CEF2F7E4592DDB1786561160C16149CF68428D51 >>>Error:KeeperErrorCode = NoNode for >>>/org.apache.manifoldcf.locks-Solr:CEF2F7E4592DDB1786561160C16149CF68428D51 >>> >>>2014-09-16 10:37:57,594 [myid:5] - INFO [ProcessThread(sid:5 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x1487dce9682001f type:create cxid:0x67 >>>zxid:0xb00000865 txntype:-1 reqpath:n/a Error >>>Path:/org.apache.manifoldcf.locks-Solr:CFCC6187B00BA4D0D7B45329CC1F5CFE0F54363B >>>Error:KeeperErrorCode = NoNode for >>>/org.apache.manifoldcf.locks-Solr:CFCC6187B00BA4D0D7B45329CC1F5CFE0F54363B >>> >>>2014-09-16 10:37:57,642 [myid:5] - INFO [ProcessThread(sid:5 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x3487dd037aa0006 type:create cxid:0x259 >>>zxid:0xb00000872 txntype:-1 reqpath:n/a Error >>>Path:/org.apache.manifoldcf.locks-Solr:6EC9E05AA96792DBE9E1653076042355EA92F5AA >>>Error:KeeperErrorCode = NoNode for >>>/org.apache.manifoldcf.locks-Solr:6EC9E05AA96792DBE9E1653076042355EA92F5AA >>> >>>2014-09-16 10:37:58,060 [myid:5] - WARN [NIOServerCxn.Factory: >>>0.0.0.0/0.0.0.0:2182:NIOServerCnxnFactory@193] - Too many connections from / >>>10.231.72.24 - max is 60 >>> >>>2014-09-16 10:37:58,073 [myid:5] - WARN [NIOServerCxn.Factory: >>>0.0.0.0/0.0.0.0:2182:NIOServerCnxnFactory@193] - Too many connections from / >>>10.231.72.24 - max is 60 >>> >>>2014-09-16 10:37:58,232 [myid:5] - INFO [ProcessThread(sid:5 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing sessionid:0x3487dd037aa0006 type:create cxid:0x279 >>>zxid:0xb0000089c txntype:-1 reqpath:n/a Error >>>Path:/org.apache.manifoldcf.locks-Solr:AD44DF3352B10CCB5790683E2E2332F7CD42D913 >>>Error:KeeperErrorCode = NoNode for >>>/org.apache.manifoldcf.locks-Solr:AD44DF3352B10CCB5790683E2E2332F7CD42D913 >>> >>>2014-09-16 10:37:58,253 [myid:5] - INFO [ProcessThread(sid:5 >>>cport:-1)::PrepRequestProcessor@645] - Got user-level KeeperException when >>>processing >>> >>>On Tue, Sep 16, 2014 at 2:23 PM, Flavio Junqueira < >>>[email protected]> wrote: >>> >>>> It seems fine to limit the amount of memory, but I'd rather get the error >>>> that is preventing the servers from starting/making progress first. >>>> >>>> -Flavio >>>> >>>> >>>> On Tuesday, September 16, 2014 9:48 AM, lalit jangra < >>>> [email protected]> wrote: >>>> >>>> >>>> > >>>> > >>>> >Thanks Flavio, >>>> > >>>> >I will try and update. Can you confirm if i add java.env under conf folder >>>> >with JVM settings as "-Xms 1024m -Xmx1024m" , it will help to limit memory >>>> >size of zookeeper till 1 G only? >>>> > >>>> >Regards. >>>> > >>>> >On Tue, Sep 16, 2014 at 2:05 PM, Flavio Junqueira < >>>> >[email protected]> wrote: >>>> > >>>> >> What if you use 'zkServer.sh start-foreground' to debug? >>>> >> >>>> >> -Flavio >>>> >> >>>> >> >>>> >> On Tuesday, September 16, 2014 5:20 AM, lalit jangra < >>>> >> [email protected]> wrote: >>>> >> >>>> >> >>>> >> > >>>> >> > >>>> >> >Hello Flavio, >>>> >> > >>>> >> >I am using 'zkServer.sh start' command to start zookeeper nodes. I also >>>> >> >could see logs in log folders in have specified but these logs are in a >>>> >> >form which is difficult to understand. >>>> >> > >>>> >> >Also regarding to using 6 zookeeper nodes (3+3), is it fine to handle >>>> >> >failures as per 50% rule as if 3 are down my cluster should work or >>>> should >>>> >> >i move to having odd numbers such as 5 or 7 here? >>>> >> > >>>> >> >Regards. >>>> >> > >>>> >> >On Tue, Sep 16, 2014 at 4:26 AM, Flavio Junqueira < >>>> >> >[email protected]> wrote: >>>> >> > >>>> >> >> Instead of guessing, I think it is best if we understand what's going >>>> >> >> wrong with the servers, you need to look at the server logs. If you >>>> >> don't >>>> >> >> know how to get it, could you please share the command you're using >>>> to >>>> >> >> start servers? >>>> >> >> >>>> >> >> -Flavio >>>> >> >> >>>> >> >> >>>> >> >> >>>> >> >> On Monday, September 15, 2014 3:30 PM, lalit jangra < >>>> >> >> [email protected]> wrote: >>>> >> >> >>>> >> >> >>>> >> >> > >>>> >> >> > >>>> >> >> >Hello Flavio, >>>> >> >> > >>>> >> >> >Can this issue arise from system not having enough RAM for Java Heap >>>> >> as i >>>> >> >> >could see my system is running on top of its RAM? >>>> >> >> > >>>> >> >> >Also is there any way to assign memory to zookeeper nodes? >>>> >> >> > >>>> >> >> >Regards. >>>> >> >> > >>>> >> >> >On Mon, Sep 15, 2014 at 7:37 PM, lalit jangra < >>>> >> [email protected]> >>>> >> >> >wrote: >>>> >> >> > >>>> >> >> >> Thanks Flavio, >>>> >> >> >> >>>> >> >> >> I am having 3+3 zookeeper nodes on two servers MCF1 & MCF2. Also i >>>> >> could >>>> >> >> >> see same error on both nodes. For logs into servers, i am not >>>> able to >>>> >> >> read >>>> >> >> >> anything from these, how can i read and interpret from zookeeper >>>> >> servers >>>> >> >> >> what is wrong? >>>> >> >> >> >>>> >> >> >> I have put different log & data directories for each of zookeeper, >>>> >> may >>>> >> >> be >>>> >> >> >> i should elaborate a bit more. I am deciding on names of logs & >>>> data >>>> >> >> >> directory as per myid (ranging from 1 to 6). >>>> >> >> >> >>>> >> >> >> ZK1 -> Data.1 -> Logs.1 >>>> >> >> >> ZK2 -> Data.2 -> Logs.2 >>>> >> >> >> ZK3 -> Data.3 -> Logs.3 >>>> >> >> >> ZK4 -> Data.4 -> Logs.4 >>>> >> >> >> ZK5 -> Data.5 -> Logs.5 >>>> >> >> >> ZK6 -> Data.6 -> Logs.6 >>>> >> >> >> >>>> >> >> >> As i have two servers only and i need to make it running on these >>>> two >>>> >> >> only >>>> >> >> >> so i chose this architecture. Also i am trying to make even for >>>> >> scenario >>>> >> >> >> where one node is down, i have only 3 zookeepers down so still >>>> >> second is >>>> >> >> >> working. If i have odd numbers say 5 or 7, if server with more >>>> >> numbers >>>> >> >> of >>>> >> >> >> zookeeper is down, its gone. >>>> >> >> >> >>>> >> >> >> Regards. >>>> >> >> >> >>>> >> >> >> >>>> >> >> >> On Mon, Sep 15, 2014 at 7:29 PM, Flavio Junqueira < >>>> >> >> >> [email protected]> wrote: >>>> >> >> >> >>>> >> >> >>> I believe you have shared just the client-side errors, and I was >>>> >> >> >>> wondering what's going on with the servers. One problem I could >>>> spot >>>> >> >> with >>>> >> >> >>> the configuration is with the values of dataDir and dataLogDir. >>>> It >>>> >> >> looks >>>> >> >> >>> like the processes on the same node are writing to the same >>>> >> directory, >>>> >> >> >>> which should be confusing the servers. >>>> >> >> >>> >>>> >> >> >>> A couple of things about your setting. I'm not sure what your >>>> >> >> motivation >>>> >> >> >>> is to put multiple servers on the same node. It will induce >>>> >> correlated >>>> >> >> >>> crashes for the servers on the same node. Also, we in general >>>> >> >> recommend to >>>> >> >> >>> use an odd number of servers (5 or 7 for your case). >>>> >> >> >>> >>>> >> >> >>> -Flavio >>>> >> >> >>> >>>> >> >> >>> On Wednesday, September 10, 2014 6:29 AM, lalit jangra < >>>> >> >> >>> [email protected]> wrote: >>>> >> >> >>> >>>> >> >> >>> >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> >Hi, >>>> >> >> >>> > >>>> >> >> >>> >I am running cluster of two Apache ManifoldCF nodes on two >>>> separate >>>> >> >> >>> >machines each of which having 3 zookeeper instances (total 6 >>>> >> >> instances in >>>> >> >> >>> >cluster). When i am running up manifoldCF agents, i see below >>>> >> warning >>>> >> >> >>> >during startup. >>>> >> >> >>> > >>>> >> >> >>> >[http-bio-80-exec-2-SendThread(iwdc1preecma03.iwater.ie:2181)] >>>> >> INFO >>>> >> >> >>> >org.apache.zookeeper.ClientCnxn - Unable to read additional data >>>> >> from >>>> >> >> >>> >server sessionid 0x0, likely server has closed socket, closing >>>> >> socket >>>> >> >> >>> >connection and attempting reconnect >>>> >> >> >>> > >>>> >> >> >>> >[http-bio-80-exec-2-SendThread(iwdc2preecma04.iwater.ie:2182)] >>>> >> INFO >>>> >> >> >>> >org.apache.zookeeper.ClientCnxn - Opening socket connection to >>>> >> server >>>> >> >> >>> >iwdc2preecma04.iwater.ie/10.231.72.25:2182. Will not attempt to >>>> >> >> >>> >authenticate using SASL (unknown error) >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> >Also i could see below error in logs in while agents are >>>> running. >>>> >> >> >>> > >>>> >> >> >>> >[localhost-startStop-1-SendThread(iwdc1preecma03.iwater.ie:2183 >>>> )] >>>> >> >> WARN >>>> >> >> >>> >org.apache.zookeeper.ClientCnxn - Session 0x6485a8006060079 for >>>> >> server >>>> >> >> >>> >iwdc1preecma03.iwater.ie/10.231.72.24:2183, unexpected error, >>>> >> closing >>>> >> >> >>> >socket connection and attempting reconnect >>>> >> >> >>> > >>>> >> >> >>> >java.io.IOException: Connection reset by peer >>>> >> >> >>> > >>>> >> >> >>> > at sun.nio.ch.FileDispatcherImpl.read0(Native Method) >>>> >> >> >>> > >>>> >> >> >>> > at >>>> >> sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39) >>>> >> >> >>> > >>>> >> >> >>> > at >>>> sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:225) >>>> >> >> >>> > >>>> >> >> >>> > at sun.nio.ch.IOUtil.read(IOUtil.java:193) >>>> >> >> >>> > >>>> >> >> >>> > at >>>> >> >> sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:375) >>>> >> >> >>> > >>>> >> >> >>> > at >>>> >> >> >>> >>>> >> >> >>> >>>> >> >> >>>> >> >>>> >org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:68) >>>> >> >> >>> > >>>> >> >> >>> > at >>>> >> >> >>> >>>> >> >> >>> >>>> >> >> >>>> >> >>>> >org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:355) >>>> >> >> >>> > >>>> >> >> >>> > at >>>> >> >> >>> >>>> >> >org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068) >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> >Below are configurations for 1. zookeeper nodes & 2. MCF nodes >>>> for >>>> >> >> >>> >zookeeper. >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> >*zoo.cfg : Same for all six zookeeper nodes.* >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> ># The number of milliseconds of each tick >>>> >> >> >>> > >>>> >> >> >>> >tickTime=2000 >>>> >> >> >>> > >>>> >> >> >>> >dataDir=/app/IW/zookeeper/data/data.1 >>>> >> >> >>> > >>>> >> >> >>> >dataLogDir=/app/IW/zookeeper/logs/log.1 >>>> >> >> >>> > >>>> >> >> >>> >clientPort=2181 >>>> >> >> >>> > >>>> >> >> >>> >server.1=iwdc1preecma03:2888:3888 >>>> >> >> >>> > >>>> >> >> >>> >server.2=iwdc1preecma03:2889:3889 >>>> >> >> >>> > >>>> >> >> >>> >server.3=iwdc1preecma03:2890:3890 >>>> >> >> >>> > >>>> >> >> >>> >server.4=iwdc2preecma04:2891:3891 >>>> >> >> >>> > >>>> >> >> >>> >server.5=iwdc2preecma04:2892:3892 >>>> >> >> >>> > >>>> >> >> >>> >server.6=iwdc2preecma04:2893:3893 >>>> >> >> >>> > >>>> >> >> >>> ># The number of ticks that the initial >>>> >> >> >>> > >>>> >> >> >>> ># synchronization phase can take >>>> >> >> >>> > >>>> >> >> >>> >initLimit=10 >>>> >> >> >>> > >>>> >> >> >>> ># The number of ticks that can pass between >>>> >> >> >>> > >>>> >> >> >>> ># sending a request and getting an acknowledgement >>>> >> >> >>> > >>>> >> >> >>> >syncLimit=5 >>>> >> >> >>> > >>>> >> >> >>> ># the directory where the snapshot is stored. >>>> >> >> >>> > >>>> >> >> >>> ># do not use /tmp for storage, /tmp here is just >>>> >> >> >>> > >>>> >> >> >>> ># example sakes. >>>> >> >> >>> > >>>> >> >> >>> >#dataDir=/tmp/zookeeper >>>> >> >> >>> > >>>> >> >> >>> ># the port at which the clients will connect >>>> >> >> >>> > >>>> >> >> >>> >#clientPort=2181 >>>> >> >> >>> > >>>> >> >> >>> ># the maximum number of client connections. >>>> >> >> >>> > >>>> >> >> >>> ># increase this if you need to handle more clients >>>> >> >> >>> > >>>> >> >> >>> >#maxClientCnxns=60 >>>> >> >> >>> > >>>> >> >> >>> ># >>>> >> >> >>> > >>>> >> >> >>> ># Be sure to read the maintenance section of the >>>> >> >> >>> > >>>> >> >> >>> ># administrator guide before turning on autopurge. >>>> >> >> >>> > >>>> >> >> >>> ># >>>> >> >> >>> > >>>> >> >> >>> ># >>>> >> >> >>> >>>> >> >> >>>> >> >>>> http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance >>>> >> >> >>> > >>>> >> >> >>> ># >>>> >> >> >>> > >>>> >> >> >>> ># The number of snapshots to retain in dataDir >>>> >> >> >>> > >>>> >> >> >>> >autopurge.snapRetainCount=3 >>>> >> >> >>> > >>>> >> >> >>> ># Purge task interval in hours >>>> >> >> >>> > >>>> >> >> >>> ># Set to "0" to disable auto purge feature >>>> >> >> >>> > >>>> >> >> >>> >autopurge.purgeInterval=1 >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> >*ManifoldCF configurations : same for both ManifoldCF nodes.* >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> ><property name="org.apache.manifoldcf.lockmanagerclass" >>>> >> >> >>> >>>> >> >value="org.apache.manifoldcf.core.lockmanager.ZooKeeperLockManager"/> >>>> >> >> >>> > >>>> >> >> >>> > <property name="org.apache.manifoldcf.zookeeper.connectstring" >>>> >> >> >>> >>>> >> >> >>> >>>> >> >> >>>> >> >>>> >value="iwdc1preecma03:2181,iwdc1preecma03:2182,iwdc1preecma03:2183,iwdc2preecma04:2181,iwdc2preecma04:2182,iwdc2preecma04:2183"/> >>>> >> >> >>> > >>>> >> >> >>> ><property name="org.apache.manifoldcf.zookeeper.sessiontimeout" >>>> >> >> >>> >value="4000"/> >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> >*I want to know if due to above warnings/errors, will zookeeper >>>> >> stop >>>> >> >> >>> >working or will zookeeper will work and these are non-failing >>>> >> >> messages, >>>> >> >> >>> >because ManifoldCF jobs are stuck while i can see these errors.* >>>> >> >> >>> > >>>> >> >> >>> >Please suggest. >>>> >> >> >>> > >>>> >> >> >>> >Regards, >>>> >> >> >>> >Lalit. >>> >>>> > >>>> >> > >>>> >> >> > >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >>> > >>>> >> >> >> >>>> >> >> >> >>>> >> >> >> >>>> >> >> >> >>>> >> >> >> -- >>>> >> >> >> Regards, >>>> >> >> >> Lalit. >>>> >> >> >> >>>> >> >> > >>>> >> >> > >>>> >> >> > >>>> >> >> >-- >>>> >> >> >Regards, >>>> >> >> >Lalit. >>>> >> >> > >>>> >> >> > >>>> >> >> > >>>> >> >> >>>> >> > >>>> >> > >>>> >> > >>>> >> >-- >>>> >> >Regards, >>>> >> >Lalit. >>>> >> > >>>> >> > >>>> >> > >>>> >> >>>> > >>>> > >>>> > >>>> >-- >>>> >Regards, >>>> >Lalit. >>>> > >>>> > >>>> > >>>> >>> >>> >>> >>>-- >>>Regards, >>>Lalit. >>> >>> >>> > > >-- > >Regards, >Lalit. > >
