zookeeper-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Camille Fournier <cami...@apache.org>
Subject Re: ZK read-only issue
Date Fri, 29 Jul 2016 18:43:03 GMT
I'm looking at the readonly mode code right now and it appears that the
only way to set readonly mode is a global system property which means that
the tests for this are only testing across 3 servers, all of which have
readonly mode set. So, this MAY be a bug, but what a pain to figure out how
to reproduce.

Global system properties: not even once.

On Fri, Jul 29, 2016 at 12:27 PM, Flavio Junqueira <fpj@apache.org> wrote:

> Not that I'm aware of...
>
> -Flavio
>
> > On 29 Jul 2016, at 17:24, Benjamin Jaton <benjamin.jaton@gmail.com>
> wrote:
> >
> > Hi Flavio,
> >
> > The bug / patch is only for the C client, does this issue affect the java
> > client as well?
> >
> > On Thu, Jul 28, 2016 at 5:01 PM, Benjamin Jaton <
> benjamin.jaton@gmail.com>
> > wrote:
> >
> >> I will definitely try and I'll post an update, thanks again Flavio.
> >>
> >> On Thu, Jul 28, 2016 at 4:59 PM, Flavio Junqueira <fpj@apache.org>
> 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 <benjamin.jaton@gmail.com>
> >>> 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 <
> >>> benjamin.jaton@gmail.com>
> >>>> 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 <fpj@apache.org>
> >>> 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 <benjamin.jaton@gmail.com
> >
> >>>>>> 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>
> >>>>>>
> >>>>>>
> >>>>>
> >>>
> >>>
> >>
>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message