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From Benjamin Jaton <bja...@radiantlogic.com>
Subject Re: Curator never goes through when ZK is read-only
Date Tue, 12 Jul 2016 18:17:02 GMT
I did not use the zkCli tool but the ZK java API directly. And other tools
like ZooInspector (contrib). They were run from a remote machine.
I ran it on the same machine and the one read only server is running
properly, I can browse it using those methods.

Trying to make sense of those client-server interactions is difficult but
here is what I got:

Client:
2016-07-12 10:55:01,508 INFO  org.apache.zookeeper.ClientCnxn:1138 - *Opening
socket connection to server QA-E8WIN11*/10.11.8.236:2181. Will not attempt
to authenticate using SASL (unknown error)
2016-07-12 10:55:01,512 INFO  org.apache.zookeeper.ClientCnxn:980 - *Socket
connection established*, initiating session, client: /10.11.12.4:60586,
server: QA-E8WIN11/10.11.8.236:2181
2016-07-12 10:55:01,521 INFO  org.apache.zookeeper.ClientCnxn:1400 - *Session
establishment complete on server QA-E8WIN11*/10.11.8.236:2181, *sessionid =
0x10003c8af640007*, negotiated timeout = 45000 (READ-ONLY mode)
2016-07-12 10:55:01,523 INFO  org.apache.zookeeper.ClientCnxn:1297 -
Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout 200
2016-07-12 10:55:01,528 INFO
 org.apache.curator.framework.state.ConnectionStateManager:228 - *State
change: READ_ONLY*
2016-07-12 10:57:08,800 INFO  org.apache.zookeeper.ClientCnxn:1253 - *Unable
to read additional data from server sessionid 0x10003c8af640007, likely
server has closed socket, closing socket connection and attempting
reconnect*
2016-07-12 10:57:08,903 INFO
 org.apache.curator.framework.state.ConnectionStateManager:228 - *State
change: SUSPENDED*


Server:
2016-07-12T10:55:56,468 [myid:] - INFO  [ProcessThread(sid:1
cport:-1)::ZooKeeperServer@678] - *Established session 0x10003c8af640007
with negotiated timeout 45000* for client /10.11.12.4:60586
(...)
2016-07-12T10:56:41,756 [myid:] - INFO  [SessionTracker:ZooKeeperServer@384]
- *Expiring session 0x10003c8af640007, timeout of 45000ms exceeded*


Note: Don't worry about the time being about 1 min off between the machines.

What I don't understand is why we are losing the read-only connection we
successfully established. ZK ro server says it timed out?

Now interestingly, when I run it on the same machine it works and completes
pretty quickly:


2016-07-12 10:43:49 INFO  o.a.z.ZooKeeper:716 - Initiating client
connection, connectString=QA-E8WIN11:2181,QA-E8WIN12:2181
sessionTimeout=45000 watcher=org.apache.curator.ConnectionState@e4487af
2016-07-12 10:43:49 INFO  o.a.z.ClientCnxn:1138 - Opening socket connection
to server QA-E8WIN12/10.11.8.232:2181. Will not attempt to authenticate
using SASL (unknown error)
Successfully established the connection with ZooKeeper
2016-07-12 10:44:10 WARN  o.a.z.ClientCnxn:1257 - Session 0x0 for server
null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection timed out: no further information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[?:1.8.0_91]
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
~[?:1.8.0_91]
at
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:355)
~[zookeeper-3.5.0-alpha.jar:3.5.2-alpha-SNAPSHOT-1702518]
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1236)
[zookeeper-3.5.0-alpha.jar:3.5.2-alpha-SNAPSHOT-1702518]
2016-07-12 10:44:11 INFO  o.a.z.ClientCnxn:1138 - Opening socket connection
to server QA-E8WIN11/10.11.8.236:2181. Will not attempt to authenticate
using SASL (unknown error)
2016-07-12 10:44:11 INFO  o.a.z.ClientCnxn:980 - Socket connection
established, initiating session, client: /10.11.8.236:50147, server:
QA-E8WIN11/10.11.8.236:2181
2016-07-12 10:44:11 INFO  o.a.z.ClientCnxn:1400 - Session establishment
complete on server QA-E8WIN11/10.11.8.236:2181, sessionid =
0x10003b315b30012, negotiated timeout = 45000 (READ-ONLY mode)
2016-07-12 10:44:11 INFO  o.a.z.ClientCnxn:1297 - Checking server
QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout 200
2016-07-12 10:44:11 INFO  o.a.c.f.s.ConnectionStateManager:228 - State
change: READ_ONLY
2016-07-12 10:44:32 INFO  o.a.z.ClientCnxn:1297 - Checking server
QA-E8WIN11/10.11.8.236:2181 for being r/w. Timeout 400
Done.


On Mon, Jul 11, 2016 at 4:42 PM, Cameron McKenzie <mckenzie.cam@gmail.com>
wrote:

> It looks like a connection issue based on the logs. When you confirmed
> that the connection was ok via the zkCli, was that running on the same host
> as the read only server? Can you run it from the same host that you're
> running the Java client from?
>
> On Tue, Jul 12, 2016 at 9:40 AM, Benjamin Jaton <benjamin.jaton@gmail.com>
> wrote:
>
>> Well I was trying to let it run and it eventually fails, with a stack:
>>
>> Successfully established the connection with ZooKeeper
>> 2016-07-11 16:28:21,943 INFO  org.apache.zookeeper.ClientCnxn:1251 -
>> Client session timed out, have not heard from server in 22519ms for
>> sessionid 0x0, closing socket connection and attempting reconnect
>> 2016-07-11 16:28:22,046 INFO  org.apache.zookeeper.ClientCnxn:1138 -
>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181. Will
>> not attempt to authenticate using SASL (unknown error)
>> 2016-07-11 16:28:22,050 INFO  org.apache.zookeeper.ClientCnxn:980 -
>> Socket connection established, initiating session, client: /
>> 10.11.12.4:54702, server: QA-E8WIN11/10.11.8.236:2181
>> 2016-07-11 16:28:22,058 INFO  org.apache.zookeeper.ClientCnxn:1400 -
>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>> sessionid = 0x100024f09360080, negotiated timeout = 45000 (READ-ONLY mode)
>> 2016-07-11 16:28:22,061 INFO  org.apache.zookeeper.ClientCnxn:1297 -
>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout 200
>> 2016-07-11 16:28:22,066 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: READ_ONLY
>> 2016-07-11 16:30:29,312 INFO  org.apache.zookeeper.ClientCnxn:1253 -
>> Unable to read additional data from server sessionid 0x100024f09360080,
>> likely server has closed socket, closing socket connection and attempting
>> reconnect
>> 2016-07-11 16:30:29,416 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: SUSPENDED
>> 2016-07-11 16:30:31,031 INFO  org.apache.zookeeper.ClientCnxn:1138 -
>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181. Will
>> not attempt to authenticate using SASL (unknown error)
>> 2016-07-11 16:30:31,032 INFO  org.apache.zookeeper.ClientCnxn:980 -
>> Socket connection established, initiating session, client: /
>> 10.11.12.4:55156, server: QA-E8WIN11/10.11.8.236:2181
>> 2016-07-11 16:30:31,034 INFO  org.apache.zookeeper.ClientCnxn:1400 -
>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>> sessionid = 0x100024f09360083, negotiated timeout = 45000 (READ-ONLY mode)
>> 2016-07-11 16:30:31,034 INFO  org.apache.zookeeper.ClientCnxn:1297 -
>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout 400
>> 2016-07-11 16:30:31,035 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: READ_ONLY
>> 2016-07-11 16:32:38,335 INFO  org.apache.zookeeper.ClientCnxn:1253 -
>> Unable to read additional data from server sessionid 0x100024f09360083,
>> likely server has closed socket, closing socket connection and attempting
>> reconnect
>> 2016-07-11 16:32:38,441 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: SUSPENDED
>> 2016-07-11 16:32:40,425 INFO  org.apache.zookeeper.ClientCnxn:1138 -
>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181. Will
>> not attempt to authenticate using SASL (unknown error)
>> 2016-07-11 16:32:40,426 INFO  org.apache.zookeeper.ClientCnxn:980 -
>> Socket connection established, initiating session, client: /
>> 10.11.12.4:55637, server: QA-E8WIN11/10.11.8.236:2181
>> 2016-07-11 16:32:40,428 INFO  org.apache.zookeeper.ClientCnxn:1400 -
>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>> sessionid = 0x100024f09360087, negotiated timeout = 45000 (READ-ONLY mode)
>> 2016-07-11 16:32:40,428 INFO  org.apache.zookeeper.ClientCnxn:1297 -
>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout 800
>> 2016-07-11 16:32:40,428 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: READ_ONLY
>> 2016-07-11 16:34:47,615 INFO  org.apache.zookeeper.ClientCnxn:1253 -
>> Unable to read additional data from server sessionid 0x100024f09360087,
>> likely server has closed socket, closing socket connection and attempting
>> reconnect
>> 2016-07-11 16:34:47,716 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: SUSPENDED
>> 2016-07-11 16:34:49,557 INFO  org.apache.zookeeper.ClientCnxn:1138 -
>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181. Will
>> not attempt to authenticate using SASL (unknown error)
>> 2016-07-11 16:34:49,558 INFO  org.apache.zookeeper.ClientCnxn:980 -
>> Socket connection established, initiating session, client: /
>> 10.11.12.4:56094, server: QA-E8WIN11/10.11.8.236:2181
>> 2016-07-11 16:34:49,560 INFO  org.apache.zookeeper.ClientCnxn:1400 -
>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>> sessionid = 0x100024f09360089, negotiated timeout = 45000 (READ-ONLY mode)
>> 2016-07-11 16:34:49,560 INFO  org.apache.zookeeper.ClientCnxn:1297 -
>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout 1600
>> 2016-07-11 16:34:49,560 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: READ_ONLY
>> 2016-07-11 16:36:56,895 INFO  org.apache.zookeeper.ClientCnxn:1253 -
>> Unable to read additional data from server sessionid 0x100024f09360089,
>> likely server has closed socket, closing socket connection and attempting
>> reconnect
>> Exception in thread "main" 2016-07-11 16:36:56,996 INFO
>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>> change: SUSPENDED
>> 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.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:310)
>>     at
>> org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:299)
>>     at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:108)
>>     at
>> org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:295)
>>     at
>> org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:287)
>>     at
>> org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:34)
>>     at TestCuratorReadOnly.main(TestCuratorReadOnly.java:23)
>>
>> On Mon, Jul 11, 2016 at 4:39 PM, Cameron McKenzie <mckenzie.cam@gmail.com
>> > wrote:
>>
>>> So, it appears that the initial connection occurs ok, but then something
>>> goes wrong
>>>
>>> 2016-07-11 15:49:15,712 INFO  org.apache.zookeeper.ClientCnxn:1253 -
>>> Unable to read additional data from server sessionid 0x100024f0936005b,
>>> likely server has closed socket, closing socket connection and attempting
>>> reconnect
>>>
>>> Then a reconnection occurs ok, and then the cycle starts again.
>>>
>>> Can you see where in the stack the getData() call is hanging?
>>>
>>> On Tue, Jul 12, 2016 at 9:35 AM, Benjamin Jaton <
>>> benjamin.jaton@gmail.com> wrote:
>>>
>>>> The blockUntilConnectedOrTimedOut() does return, we see the line:
>>>> "Successfully established the connection with ZooKeeper"
>>>> which happens right after.
>>>>
>>>> The getData() is where it hangs.
>>>>
>>>> We see this first:
>>>> 2016-07-11 15:47:08,420 INFO
>>>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>>>> change: READ_ONLY
>>>>
>>>> and then we see it again 2 minutes later:
>>>> 2016-07-11 15:49:17,316 INFO
>>>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>>>> change: READ_ONLY
>>>>
>>>> and then again 2 minutes after that:
>>>> 2016-07-11 15:51:26,470 INFO
>>>> org.apache.curator.framework.state.ConnectionStateManager:228 - State
>>>> change: READ_ONLY
>>>>
>>>> Then I stopped it.
>>>>
>>>> On Mon, Jul 11, 2016 at 4:13 PM, Cameron McKenzie <
>>>> mckenzie.cam@gmail.com> wrote:
>>>>
>>>>> hey Ben,
>>>>> From the logs it looks like the connection is established at the end?
>>>>>
>>>>> Are you saying that the blockUntilConnectedOrTimedOut() does not
>>>>> return when this occurs?
>>>>> cheers
>>>>>
>>>>>
>>>>> On Tue, Jul 12, 2016 at 9:10 AM, Benjamin Jaton <
>>>>> bjaton@radiantlogic.com> wrote:
>>>>>
>>>>>> ZK is 3.5.1-alpha
>>>>>> Curator is 2.11.0
>>>>>>
>>>>>> On Mon, Jul 11, 2016 at 4:01 PM, Benjamin Jaton <
>>>>>> bjaton@radiantlogic.com> wrote:
>>>>>>
>>>>>>> I have a 3 nodes ZK cluster , readonly mode is enabled.
>>>>>>> 2 nodes are down, so the third one is in read-only (verified
by
>>>>>>> using the ZK API manually).
>>>>>>>
>>>>>>> I'm using this piece of code:
>>>>>>>
>>>>>>> Builder curatorClientBuilder = CuratorFrameworkFactory.builder()
>>>>>>> .connectString("QA-E8WIN11:2181,QA-E8WIN12:2181")
>>>>>>> .sessionTimeoutMs(45000).connectionTimeoutMs(15000)
>>>>>>> .retryPolicy(new RetryNTimes(3, 5000)).canBeReadOnly(true);
>>>>>>>
>>>>>>> CuratorFramework client = curatorClientBuilder.build();
>>>>>>> client.start();
>>>>>>> client.getZookeeperClient().blockUntilConnectedOrTimedOut();
>>>>>>> System.out.println("Successfully established the connection with
>>>>>>> ZooKeeper");
>>>>>>> client.getData().forPath("/");
>>>>>>> System.out.println("Done.");
>>>>>>>
>>>>>>> When curator pick the host that is UP first, it goes through
very
>>>>>>> quickly. When it picks the host that is down first (QA-E8WIN12),
it never
>>>>>>> goes through.
>>>>>>>
>>>>>>> Am I missing something here?
>>>>>>>
>>>>>>> Below is the log:
>>>>>>>
>>>>>>> 2016-07-11 15:46:45,733 INFO
>>>>>>>  org.apache.curator.framework.imps.CuratorFrameworkImpl:235 -
Starting
>>>>>>> 2016-07-11 15:46:45,743 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:zookeeper.version=3.5.1-alpha-1748895, built
on
>>>>>>> 06/17/2016 22:24 GMT
>>>>>>> 2016-07-11 15:46:45,743 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:host.name=w-rli09-ben
>>>>>>> 2016-07-11 15:46:45,744 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:java.version=1.8.0_11
>>>>>>> 2016-07-11 15:46:45,744 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:java.vendor=Oracle Corporation
>>>>>>> 2016-07-11 15:46:45,744 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:java.home=/usr/local/apps/jdk1.8.0_11/jre
>>>>>>> 2016-07-11 15:46:45,744 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:java.class.path=(..)
>>>>>>> 2016-07-11 15:46:45,746 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:java.io.tmpdir=/tmp
>>>>>>> 2016-07-11 15:46:45,746 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:java.compiler=<NA>
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:os.name=Linux
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:os.arch=amd64
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:os.version=3.8.0-44-generic
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:user.name=benji
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:user.home=(..)
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:user.dir=(..)
>>>>>>> 2016-07-11 15:46:45,747 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:os.memory.free=385MB
>>>>>>> 2016-07-11 15:46:45,748 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:os.memory.max=5358MB
>>>>>>> 2016-07-11 15:46:45,748 INFO  org.apache.zookeeper.ZooKeeper:109
-
>>>>>>> Client environment:os.memory.total=397MB
>>>>>>> 2016-07-11 15:46:45,750 INFO  org.apache.zookeeper.ZooKeeper:716
-
>>>>>>> Initiating client connection, connectString=QA-E8WIN11:2181,QA-E8WIN12:2181
>>>>>>> sessionTimeout=45000 watcher=org.apache.curator.ConnectionState@3e96bacf
>>>>>>> 2016-07-11 15:46:45,769 INFO  org.apache.zookeeper.ClientCnxn:1138
-
>>>>>>> Opening socket connection to server QA-E8WIN12/10.11.8.232:2181.
>>>>>>> Will not attempt to authenticate using SASL (unknown error)
>>>>>>> Successfully established the connection with ZooKeeper
>>>>>>> 2016-07-11 15:47:08,300 INFO  org.apache.zookeeper.ClientCnxn:1251
-
>>>>>>> Client session timed out, have not heard from server in 22534ms
for
>>>>>>> sessionid 0x0, closing socket connection and attempting reconnect
>>>>>>> 2016-07-11 15:47:08,403 INFO  org.apache.zookeeper.ClientCnxn:1138
-
>>>>>>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181.
>>>>>>> Will not attempt to authenticate using SASL (unknown error)
>>>>>>> 2016-07-11 15:47:08,406 INFO  org.apache.zookeeper.ClientCnxn:980
-
>>>>>>> Socket connection established, initiating session, client: /
>>>>>>> 10.11.12.4:47004, server: QA-E8WIN11/10.11.8.236:2181
>>>>>>> 2016-07-11 15:47:08,413 INFO  org.apache.zookeeper.ClientCnxn:1400
-
>>>>>>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>>>>>>> sessionid = 0x100024f0936005b, negotiated timeout = 45000 (READ-ONLY
mode)
>>>>>>> 2016-07-11 15:47:08,415 INFO  org.apache.zookeeper.ClientCnxn:1297
-
>>>>>>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout
>>>>>>> 200
>>>>>>> 2016-07-11 15:47:08,420 INFO
>>>>>>>  org.apache.curator.framework.state.ConnectionStateManager:228
- State
>>>>>>> change: READ_ONLY
>>>>>>> 2016-07-11 15:49:15,712 INFO  org.apache.zookeeper.ClientCnxn:1253
-
>>>>>>> Unable to read additional data from server sessionid 0x100024f0936005b,
>>>>>>> likely server has closed socket, closing socket connection and
attempting
>>>>>>> reconnect
>>>>>>> 2016-07-11 15:49:15,815 INFO
>>>>>>>  org.apache.curator.framework.state.ConnectionStateManager:228
- State
>>>>>>> change: SUSPENDED
>>>>>>> 2016-07-11 15:49:17,313 INFO  org.apache.zookeeper.ClientCnxn:1138
-
>>>>>>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181.
>>>>>>> Will not attempt to authenticate using SASL (unknown error)
>>>>>>> 2016-07-11 15:49:17,314 INFO  org.apache.zookeeper.ClientCnxn:980
-
>>>>>>> Socket connection established, initiating session, client: /
>>>>>>> 10.11.12.4:47295, server: QA-E8WIN11/10.11.8.236:2181
>>>>>>> 2016-07-11 15:49:17,316 INFO  org.apache.zookeeper.ClientCnxn:1400
-
>>>>>>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>>>>>>> sessionid = 0x100024f0936005f, negotiated timeout = 45000 (READ-ONLY
mode)
>>>>>>> 2016-07-11 15:49:17,316 INFO  org.apache.zookeeper.ClientCnxn:1297
-
>>>>>>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout
>>>>>>> 400
>>>>>>> 2016-07-11 15:49:17,316 INFO
>>>>>>>  org.apache.curator.framework.state.ConnectionStateManager:228
- State
>>>>>>> change: READ_ONLY
>>>>>>> 2016-07-11 15:51:24,607 INFO  org.apache.zookeeper.ClientCnxn:1253
-
>>>>>>> Unable to read additional data from server sessionid 0x100024f0936005f,
>>>>>>> likely server has closed socket, closing socket connection and
attempting
>>>>>>> reconnect
>>>>>>> 2016-07-11 15:51:24,713 INFO
>>>>>>>  org.apache.curator.framework.state.ConnectionStateManager:228
- State
>>>>>>> change: SUSPENDED
>>>>>>> 2016-07-11 15:51:26,467 INFO  org.apache.zookeeper.ClientCnxn:1138
-
>>>>>>> Opening socket connection to server QA-E8WIN11/10.11.8.236:2181.
>>>>>>> Will not attempt to authenticate using SASL (unknown error)
>>>>>>> 2016-07-11 15:51:26,468 INFO  org.apache.zookeeper.ClientCnxn:980
-
>>>>>>> Socket connection established, initiating session, client: /
>>>>>>> 10.11.12.4:47576, server: QA-E8WIN11/10.11.8.236:2181
>>>>>>> 2016-07-11 15:51:26,470 INFO  org.apache.zookeeper.ClientCnxn:1400
-
>>>>>>> Session establishment complete on server QA-E8WIN11/10.11.8.236:2181,
>>>>>>> sessionid = 0x100024f09360061, negotiated timeout = 45000 (READ-ONLY
mode)
>>>>>>> 2016-07-11 15:51:26,470 INFO  org.apache.zookeeper.ClientCnxn:1297
-
>>>>>>> Checking server QA-E8WIN12/10.11.8.232:2181 for being r/w. Timeout
>>>>>>> 800
>>>>>>> 2016-07-11 15:51:26,470 INFO
>>>>>>>  org.apache.curator.framework.state.ConnectionStateManager:228
- State
>>>>>>> change: READ_ONLY
>>>>>>> (...)
>>>>>>>
>>>>>>> Thanks
>>>>>>> Ben
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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