I will definitely try and I'll post an update, thanks again Flavio. On Thu, Jul 28, 2016 at 4:59 PM, Flavio Junqueira <[email protected]> wrote:
> I think you're hitting this: > > https://issues.apache.org/jira/browse/ZOOKEEPER-2466 < > https://issues.apache.org/jira/browse/ZOOKEEPER-2466> > > which is resolved for 3.5.3 and trunk. You can try out the patch. > > -Flavio > > > On 29 Jul 2016, at 00:56, Benjamin Jaton <[email protected]> > wrote: > > > > OK so I did another fresh install this time using 3.5.2-alpha, and the > read > > only client doesn't seem to try all the hosts available. > > > > I create my client with: > > ZooKeeper zk = new ZooKeeper("10.11.9.70:2181,10.11.12.4:2181, > > 10.11.12.210:2181", 45000, this, true); > > > > In the following output, it only checks for 10.11.12.4:2181 and > > 10.11.12.210:2181, but it doesn't try 10.11.9.70:2181 which is where the > > running server is. > > > > 0 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:zookeeper.version=3.5.2-alpha-1753710, built on 07/21/2016 > > 16:24 GMT > > 1 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment: > host.name > > =w-rli09-ben > > 1 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:java.version=1.8.0_11 > > 1 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:java.vendor=Oracle Corporation > > 1 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:java.home=/usr/local/apps/jdk1.8.0_11/jre > > 1 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > > environment:java.class.path=/home/benji/workspace-trunk/testzkclient/bin:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/commons-cli-1.2.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jackson-core-asl-1.9.11.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jackson-mapper-asl-1.9.11.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/javacc.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jetty-6.1.26.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jetty-util-6.1.26.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/jline-2.11.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/log4j-1.2.17.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/netty-3.10.5.Final.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/servlet-api-2.5-20081211.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/slf4j-api-1.7.5.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/lib/slf4j-log4j12-1.7.5.jar:/home/benji/workspace-trunk/zookeeper-3.5.2/build/zookeeper-3.5.2-alpha.jar > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > > environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:java.io.tmpdir=/tmp > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:java.compiler=<NA> > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment: > os.name > > =Linux > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:os.arch=amd64 > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:os.version=3.8.0-44-generic > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client environment: > user.name > > =benji > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:user.home=/home/benji > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:user.dir=/home/benji/workspace-trunk/testzkclient > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:os.memory.free=376MB > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:os.memory.max=5358MB > > 2 [main] INFO org.apache.zookeeper.ZooKeeper - Client > > environment:os.memory.total=378MB > > *8 [main] INFO org.apache.zookeeper.ZooKeeper - Initiating client > > connection, connectString=10.11.9.70:2181 > > <http://10.11.9.70:2181>,10.11.12.4:2181 > > <http://10.11.12.4:2181>,10.11.12.210:2181 <http://10.11.12.210:2181> > > sessionTimeout=45000 watcher=testzkclient.TestZkReadOnlyClient@5010be6* > > 21 [main] DEBUG org.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer > is > > 4194304 > > Successfully established the connection with ZooKeeper > > *37 [main-SendThread(10.11.12.4:2181 <http://10.11.12.4:2181>)] INFO > > org.apache.zookeeper.ClientCnxn - Opening socket connection to server > > 10.11.12.4/10.11.12.4:2181 <http://10.11.12.4/10.11.12.4:2181>. Will not > > attempt to authenticate using SASL (unknown error)* > > 43 [main-SendThread(10.11.12.4:2181)] WARN > org.apache.zookeeper.ClientCnxn > > - Session 0x0 for server null, unexpected error, closing socket > connection > > and attempting reconnect > > java.net.ConnectException: Connection refused > > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > > at > > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:712) > > at > > > org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357) > > at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214) > > 45 [main-SendThread(10.11.12.4:2181)] DEBUG > > org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during > > shutdown input > > java.nio.channels.ClosedChannelException > > at > > sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:775) > > at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:402) > > at > > > org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:198) > > at > > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325) > > at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245) > > 45 [main-SendThread(10.11.12.4:2181)] DEBUG > > org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during > > shutdown output > > java.nio.channels.ClosedChannelException > > at > > sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:792) > > at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:410) > > at > > > org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:205) > > at > > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325) > > at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245) > > *149 [main-SendThread(10.11.12.210:2181 <http://10.11.12.210:2181>)] > INFO > > org.apache.zookeeper.ClientCnxn - Opening socket connection to server > > 10.11.12.210/10.11.12.210:2181 <http://10.11.12.210/10.11.12.210:2181>. > > Will not attempt to authenticate using SASL (unknown error)* > > 150 [main-SendThread(10.11.12.210:2181)] WARN > > org.apache.zookeeper.ClientCnxn - Session 0x0 for server null, > unexpected > > error, closing socket connection and attempting reconnect > > java.net.ConnectException: Connection refused > > at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) > > at > > sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:712) > > at > > > org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357) > > at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214) > > 150 [main-SendThread(10.11.12.210:2181)] DEBUG > > org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during > > shutdown input > > java.nio.channels.ClosedChannelException > > at > > sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:775) > > at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:402) > > at > > > org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:198) > > at > > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325) > > at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245) > > 150 [main-SendThread(10.11.12.210:2181)] DEBUG > > org.apache.zookeeper.ClientCnxnSocketNIO - Ignoring exception during > > shutdown output > > java.nio.channels.ClosedChannelException > > at > > sun.nio.ch.SocketChannelImpl.shutdownOutput(SocketChannelImpl.java:792) > > at sun.nio.ch.SocketAdaptor.shutdownOutput(SocketAdaptor.java:410) > > at > > > org.apache.zookeeper.ClientCnxnSocketNIO.cleanup(ClientCnxnSocketNIO.java:205) > > at > > org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:1325) > > at > org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1245) > > *Exception in thread "main" > > org.apache.zookeeper.KeeperException$ConnectionLossException: > > KeeperErrorCode = ConnectionLoss for /* > > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:99) > > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:51) > > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1956) > > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1985) > > at testzkclient.TestZkReadOnlyClient.run(TestZkReadOnlyClient.java:26) > > at > testzkclient.TestZkReadOnlyClient.main(TestZkReadOnlyClient.java:13) > > > > > > Does anybody else have issues with the readonly mode? > > > > Thanks > > Benjamin > > > > > > On Sat, Jul 16, 2016 at 7:39 PM, Benjamin Jaton < > [email protected]> > > wrote: > > > >> Very interesting, thank you Flavio. > >> > >> That should not happen because I have actually never started (even never > >> created) the other servers. This server is the first one the client > could > >> have possibly ever seen. Maybe the server has to have been in a > functioning > >> ensemble at least once before being able to be read only able? > >> I will recheck all my setup and do it again. > >> Thanks again, > >> Ben > >> > >> On Wed, Jul 13, 2016 at 2:06 PM, Flavio Junqueira <[email protected]> > wrote: > >> > >>> From the logs, it looks like the server the client is trying to connect > >>> to is behind compared to last zxid the client has seen: > >>> > >>> Refusing session request for client /10.11.12.4:49237 as it has > >>> seen zxid 0x3 our last zxid is 0x0 client must try another server > >>> > >>> I believe the behavior we currently have is that a client can connect > to > >>> an RO server, but the server must have a view at least as recent as the > >>> server. > >>> > >>> -Flavio > >>> > >>>> On 12 Jul 2016, at 16:23, Benjamin Jaton <[email protected]> > >>> wrote: > >>>> > >>>> Hello, > >>>> > >>>> I'm having problems using ZK in read-only mode. > >>>> I am using a fresh install of ZK 3.5.1-alpha where I configure the > >>> installation to be in a 3 nodes ensemble. > >>>> I start this node only (QA-E8WIN11) with -Dreadonlymode.enabled=true. > >>>> > >>>> I see that the node QA-E8WIN11 starts the RO server properly: > >>>> 2016-07-12 16:10:10,955 [myid:1] - INFO > >>> [Thread-4:ReadOnlyZooKeeperServer@73] - Read-only server started > >>>> > >>>> Then I make a read-only enabled client: > >>>> > >>>> ZooKeeper zk = new > >>> ZooKeeper("QA-E8WIN12:2181,QA-E8WIN13:2181,QA-E8WIN11:2181", 45000, > this, > >>> true); > >>>> System.out.println("Successfully established the connection > >>> with ZooKeeper"); > >>>> > >>>> zk.getData("/", false, null); > >>>> System.out.println("Done."); > >>>> > >>>> Note that only QA-E8WIN11 is started, the other 2 are not. > >>>> > >>>> When the ZK client picks QA-E8WIN11 first, it works. > >>>> But when it picks a different node, it fails with: > >>>> > >>>> 16:10:13.338 org.apache.zookeeper.ZooKeeper:716 - Initiating client > >>> connection, > connectString=QA-E8WIN12:2181,QA-E8WIN13:2181,QA-E8WIN11:2181 > >>> sessionTimeout=45000 watcher=TestZkReadOnly@68de145 > >>>> Successfully established the connection with ZooKeeper > >>>> 16:10:13.475 org.apache.zookeeper.ClientCnxn:1138 - Opening socket > >>> connection to server QA-E8WIN13/10.11.8.230:2181 < > >>> http://10.11.8.230:2181/>. Will not attempt to authenticate using SASL > >>> (unknown error) > >>>> 16:10:28.469 org.apache.zookeeper.ClientCnxn:1251 - Client session > >>> timed out, have not heard from server in 15001ms for sessionid 0x0, > closing > >>> socket connection and attempting reconnect > >>>> 16:10:28.574 org.apache.zookeeper.ClientCnxn:1138 - Opening socket > >>> connection to server QA-E8WIN12/10.11.8.232:2181 < > >>> http://10.11.8.232:2181/>. Will not attempt to authenticate using SASL > >>> (unknown error) > >>>> Exception in thread "main" > >>> org.apache.zookeeper.KeeperException$ConnectionLossException: > >>> KeeperErrorCode = ConnectionLoss for / > >>>> at > >>> org.apache.zookeeper.KeeperException.create(KeeperException.java:99) > >>>> at > >>> org.apache.zookeeper.KeeperException.create(KeeperException.java:51) > >>>> at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1753) > >>>> at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1782) > >>>> at TestZkReadOnly.run(TestZkReadOnly.java:26) > >>>> at TestZkReadOnly.main(TestZkReadOnly.java:16) > >>>> > >>>> I'm attaching all the logs. The server and the client are on the same > >>> machine QA-E8WIN11. > >>>> > >>>> Any help would be greatly appreciated! > >>>> > >>>> Thanks, > >>>> Benjamin Jaton > >>>> <zkclient.log><zkserver.log> > >>> > >>> > >> > >
