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> nabble.com/How-to-Force-a-Connection-Failover-in-an-
> ActiveMQ-Replicated-LevelDB-Cluster-tp4720385p4720571.html
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>
The JMX operations "stop", "start" (or "restart") on the Master Broker do the
job.
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Sent fr
I haven't personally tried this, but I'd expect that calling stop() on the
networkConnector for the master broker via JMX would do what you want
without requiring a full restart. (Then you could call start() to bring it
back, as the slave.) http://activemq.apache.org/jmx.html has a table that
lis
Currently I stop the ActiveMQ Master Node (by a systemd service) to force a
Slave become the new Master.
Afterwards I restart the stopped ActiveMQ Master Node (by a systemd
service) which will become a new Slave.
Is there another way to Force a Connection Failover without stopping and
restarting t
Tim,
I have submitted a bug report in JIRA :
https://issues.apache.org/jira/browse/AMQ-6502
Patrick
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Can you reproduce this reliably? If so, please submit a bug report in
JIRA.
Tim
On Nov 8, 2016 1:40 AM, "Patrick Vansevenant"
wrote:
The StorePercentUsage of the master node is increasing and decreasing but
remains more or less stable
over the time.
The StorePercentUsage of the slave nodes (J
The StorePercentUsage of the master node is increasing and decreasing but
remains more or less stable
over the time.
The StorePercentUsage of the slave nodes (JMX), on the other hand, is
increasing all the time.
I have already noticed values of 200% and more.
The HA Cluster seems to work and I do
Hi I am also facing the same issue.Kindly suggest the solution.I have
restarted zookeeper one after other in three servers.2. after starting the
slave server activemq i am getting above issue reported.
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network where the connections from one broker go to whichever
member of a master/slave grouping is the active one at any point.
What you've described in this thread sounds like you're doing master/slave
using Zookeeper and replicated LevelDB, which is why you only have one
active broker
Thank you very much. that's what I understood from the master / slave
what I want to do is http://activemq.apache.org/networks-of-brokers.html
But I always have a master / slave behavior
A+JYT
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foo.bar queue in this broker exist but is empty
I've lost my message.
I'm trying to make a active/active cluster not master/slave. I need to
secure it. I can't lost any messages.
A+JYT
PS I'm running activeMQ 5.11.1 and zookeeper 3.4.6
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empty
I've lost my message.
I'm trying to make a active/active cluster not master/slave. I need to
secure it. I can't lost any messages.
A+JYT
PS I'm running activeMQ 5.11.1 and zookeeper 3.4.6
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elp
A+JYT
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ble.com/A-lot-of-WARNs-invalid-logRefDecrement-on-the-slaves-of-Replicated-LevelDB-cluster-tp4710993.html
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Wouldn't you implement this at the OS level, not in ActiveMQ
configuration? If each broker host's routing tables run the other broker
hosts' hostnames/IPs through the 10GbE NIC, that should do it.
On Apr 2, 2016 12:51 PM, "cmuarg" wrote:
> I’m running activemq rep
I’m running activemq replicated leveldb on 3 servers with two nics, a 1Gbit
and a 10Gbit.
I want the servers to communicate via the 10Gbit nics to which the clients
do not have access.
If possible, how configure?
Thanks
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FO | Using the pure java LevelDB
implementation. | org.apache.activemq.leveldb.LevelDBClient |
hawtdispatch-DEFAULT-1
Please advise if somebody have any idea
Thanks in advance
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tampered & can impact the
cluster.
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I have created 2 Jira’s for issues I have encountered with ActiveMQ with
Replicated LevelDB. The latest issue I am encountering is more critical as the
earlier one can be gotten around with NFSv3.
https://issues.apache.org/jira/browse/AMQ-6173
<https://issues.apache.org/jira/browse/AMQ-6
Please do; NFS issues are a known problem for KahaDB where you have a
shared filesystem, but replicated LevelDB isn't supposed to have any shared
filesystem elements and I've never heard of anyone having similar issues.
Please document the options you're using for both your
Hi Tim,
I have been researching ActiveMQ with Replicated LevelDB for more than a
month. I couldn’t figure out why it won’t failover back to the first server in
the lineup. After lots of elimination process, I ended up suspecting the NFSv4
as I had issues with NFSv4 in non-ActiveMQ
I can't help you (I've never used LevelDB) and this list doesn't have a
resident LevelDB expert, but this sounds like a real bug so please submit a
bug in JIRA if you haven't already. Can you reliably reproduce the problem?
On Jan 31, 2016 11:33 PM, "Sunil Vishwanath" wrote:
> Hello,
> I am ve
The problem went away after the filesystem was downgraded to NFSv3 from
NFSv4.
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Hello,
I am very new to this forum and I am hoping that you all will see this email.
Currently I am testing the following setup:
ActiveMQ 5.13.0 with LevelDB (3 node cluster).
Zookeeper 3.4.6 (3 node cluster).
Started up all 3 Zookeeper nodes.
Started up all 3 ActiveMQ nodes.
As I started a
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> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
1-st slave
StorePercentUsage=510
TempPercentUsage=146
and on 2-nd slave
StorePercentUsage=424
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brokers in a LevelDB cluster have vastly different
StorePercentUsage values?
Are there any best practices on managing and monitoring ActiveMQ?
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Sent from the
-hs /var/activemq/data/
> 266M /var/activemq/data
> Slave1:
> du -hs /var/activemq/data/
> 124M /var/activemq/data
> Slave2:
> du -hs /var/activemq/data/
> 119M /var/activemq/data
>
> So question is what means
> StorePercentUsage=93
> TempPercentUsage=146
&
means
StorePercentUsage=93
TempPercentUsage=146
then used Replicated LevelDB Store
Or in another words why Replicated LevelDB Store ignores this settings
StoreLimit=8589934592
TempLimit=5368709120
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util.Log$class#debug 112 DEBUG] - on rollback,
> the transaction TX:ID:app1.net-38906-1439632105449-7:13:42 does not exist
>
> That's why I am suspecting that could this cause broker to stop ?
>
> Thanks,
> Anuj
>
>
>
> --
> View this message in contex
#x27;s why I am suspecting that could this cause broker to stop ?
Thanks,
Anuj
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the
> past, you've had NFS trouble; did that happen again here?
> On Aug 19, 2015 1:14 AM, "khandelwalanuj"
> wrote:
>
>> hi,
>>
>> I am using replicated leveldb with ActiveMQ.5.11.1. We have recently
>> observed an issue where when client co
Did anyone get a chance to look at this ?
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hi,
I am using replicated leveldb with ActiveMQ.5.11.1. We have recently
observed an issue where when client connection removal caused broker to
shutdown. This is very weird. The client is a durable consumer who uses
transactions and calls commit after each 10 messages.
Can someone suggest what
er, and master election happens via zookeeper. So both of them sends
their updated positions to the zookeeper and whoever has the latest position
becomes the master.
Thanks,
Anuj
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> So in my case a single broker can also serve the client(1/2 +1 = 1)
>
> Thanks,
> Anuj
>
>
>
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> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
Hi Jim,
But I am using replica =1 and
(quorum = replica/2+1) AND quorum != (no of broker/2 +1).
So in my case a single broker can also serve the client(1/2 +1 = 1)
Thanks,
Anuj
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>
Any updates here.
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I've had a dev cluster running for a little while now and twice I've seen
interruptions where the cluster didn't recover, didn't select a new master.
I had hoped AMQ-5082 fixed that issue but it looks like there might be
additional problems. How many of you folks are runnin
Peter ,
Many thanks. I understood it now.
So this means basically that Apollo is now not under development.
Artemis will be the new release.
Thanks for the help.
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There is no such thing as ActiveMQ 6, yet.
The code base of JBoss HornetQ was donated to the ActiveMQ community. That
contribution was initially named ActiveMQ 6 (hence the git repo name) but
is now known as ActiveMQ Artemis (Apollos twin sister in mythology).
After the donation, a lot of work ha
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there isn't any active development on Apollo at the moment... but if you're
keen to use it, and willing to contribute back, i know there are a few
others that would offer to help :) but at the moment apollo doesn't have
replicated leveldb. you could also take a look at ActiveMQ Art
Hi All,
Sorry if this is a new bie question
Can Apollo be used with replicated levelDB store?
We recently benchmarked apollo and found it very suitable for our usecase.
However we would like to have the option for HA and Failover.
Is there any doc explaining integrating replicated levelDB with
On Tue, Mar 31, 2015 at 1:32 PM, wonderkind wrote:
> What version of ActiveMQ are you running with? I am working with 5.11.1..
I'm running 5.11.1 plus the patch in ticket AMQ-5082.
Jim
iveMQ]"
mailto:ml-node+s2283324n4694156...@n4.nabble.com>>
Date: Tuesday, March 31, 2015 at 12:37 PM
To: SNEI mailto:kevin...@am.sony.com>>
Subject: Re: Creating a Network of Replicated LevelDB broker clusters
On Tue, Mar 31, 2015 at 12:08 PM, wonderkind <[hidden
email]> wrote:
>
On Tue, Mar 31, 2015 at 12:08 PM, wonderkind wrote:
>
> Is your broker running pretty clean when you send messages through the
fabric of network of replicated master/slaves?
Yes, though I'm only running the examples/openwire/swissarmy
producer/consumer example using the defaults. On the 2nd
cl
To: SNEI mailto:kevin...@am.sony.com>>
Subject: Re: Creating a Network of Replicated LevelDB broker clusters
On Mon, Mar 30, 2015 at 4:57 PM, wonderkind <[hidden
email]> wrote:
> Do you have a sample activemq.xml configuration file you could share for
your 3 x 3 cluster? I am tr
On Mon, Mar 30, 2015 at 4:57 PM, wonderkind wrote:
> Do you have a sample activemq.xml configuration file you could share for
your 3 x 3 cluster? I am trying to do the same, with everything running
on my Mac initially.
On the amq-prod-1 cluster my network connector url is
masterslave:(tcp://am
NEI mailto:kevin...@am.sony.com>>
Subject: Re: Creating a Network of Replicated LevelDB broker clusters
On Mon, Mar 30, 2015 at 2:09 PM, wonderkind <[hidden
email]> wrote:
> How big is your network? Do you see any significant degradation with a
> network of replicated levelDB brokers?
I
On Mon, Mar 30, 2015 at 2:09 PM, wonderkind wrote:
> How big is your network? Do you see any significant degradation with a
> network of replicated levelDB brokers?
I haven't started stress testing the configuration yet, the current plan
is to have network two clusters of thr
Hi Jim,
How big is your network? Do you see any significant degradation with a network
of replicated levelDB brokers? Please see my comment below in red on my
original post on the forum.
Thanks.
Kevin
From: "James A. Robinson-2 [via ActiveMQ]"
mailto:ml-node+s2283324n469
On Fri, Mar 27, 2015 at 11:48 AM, wonderkind wrote:
> Has anyone ever created a network of brokers, with each broker been a
> Master/Slave replicated LevelDB store?
>
My understanding has been that, for replicated LevelDB, you need
a set of three brokers, one master two slave, in orde
Has anyone ever created a network of brokers, with each broker been a
Master/Slave replicated LevelDB store?
Is this possible? Any problem with stability during new master election?
Thanks
On Wed, Mar 11, 2015 at 3:28 PM, Gary Tully wrote:
> I think you are correct here. The rebuild should work so long as the
> session has not expired.
The nodes in the zookeeper group tree are ephemeral, so they
disappear once the session is lost. I think the underlying client
manages to re-establ
I think you are correct here. The rebuild should work so long as the
session has not expired.
On 11 March 2015 at 20:51, James A. Robinson wrote:
> So I think the problem is that
>
> org.linkedin.zookeeper.tracker.ZooKeeperTreeTracker
>
> doesn't appear to handle the event of a session disconnect
So I think the problem is that
org.linkedin.zookeeper.tracker.ZooKeeperTreeTracker
doesn't appear to handle the event of a session disconnect.
Or at least the version used by ActiveMQ doesn't...
If I force tree to be rebuilt on a reconnect, my earlier unit test
passes:
https://github.com/jimrob
Working my way through the code and the debug log from
the test, I see that the ZooKeeper group is getting emptied
out after session expiration occurs:
before the timeout:
2015-03-10 12:09:50,614 | DEBUG | ActiveMQ Task | ZooKeeper group for
01 changed: Map(foo ->
ListBuffer((00,{
On Wed, Mar 4, 2015 at 12:29 PM, James A. Robinson wrote:
> Thanks. I'm pretty sure AMQ-5082 is what I'm seeing on 5.11.1.
> I'll see if I can get the cycles to set up a unit test to replicate the
> issue.
I think I've got the use a case represented for
https://issues.apache.org/jira/browse/AMQ-
; wrote:
>
>> Hi folks,
>>
>> While testing out ActiveMQ I've been building clusters
>> VirtualBox. I've been spinning up two 3-node Replicated
>> LevelDB stores on my laptop.
>>
>> I've noticed that the clusters can sometimes get into a
other).
On Mar 3, 2015 8:23 AM, "James A. Robinson" wrote:
> Hi folks,
>
> While testing out ActiveMQ I've been building clusters
> VirtualBox. I've been spinning up two 3-node Replicated
> LevelDB stores on my laptop.
>
> I've noticed that the clus
Hi folks,
While testing out ActiveMQ I've been building clusters
VirtualBox. I've been spinning up two 3-node Replicated
LevelDB stores on my laptop.
I've noticed that the clusters can sometimes get into a
state where none of the nodes is the master. It appears
to me as thoug
We are currently selecting a suitable data store for our ActiveMQ
implementation.Are there any benchmarks or performance comparisons for the
JDBC and replicated LevelDB data store options, other than LevelDB is more
performant?
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ill batch
>
>
>
>
>
>
> --
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>
As per
http://activemq.apache.org/replicated-leveldb-store.html
there is no additional requirements on the client.
Clients still need to know the location and address of each broker and specify
it inside the failover protocol (or use other forms of discovery such as
multicast).
In JBoss Fuse
Ref http://activemq.apache.org/replicated-leveldb-store.html
Is this page actually detailing that Zookeeper will maintain one master
BROKER and that writes through this broker will be replicated to slave
brokers?
I read - interpreted - the URL and title as being about leveldb data being
I'm having a little trouble connecting the dots with the source code, but it
does appear that setting is using an ActiveMQ transport connection.
Can you try using ssl: and report back the results?
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> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
Never mind. There is a issue already open against it. Fixed on 5.11
https://issues.apache.org/jira/browse/AMQ-5105
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Hi
I've just setup a three ActiveMQ 5.10 nodes in master/slave configuration
with replicated LevelDB. I've also setup the Zookeeper server in the same
nodes. Zookeeper seems running pretty much okay as far I can see.
When I crank up the first ActiveMQ node, it stops waiting for anoth
xt:
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Did anyone get a chance to look at this ?
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Please respond .
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leveldb/stash/064004c6.log
Activemq vendors, please respond about above observations.
Thanks,
Anuj
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Sent from th
>From the documentation here
<http://activemq.apache.org/replicated-leveldb-store.html> :
All messaging operations which require a sync to disk will wait for the
update to be replicated to a quorum of the nodes before completing. So if
you configure the store with replicas="3&qu
se questions on the LevelDB
mailing list instead.
khandelwalanuj wrote
> Hi,
>
> Is it possible to copy data from leveldb store of one broker to another
> broker while using replicated leveldb.
>
> For ex. : Let's say 3 brokers are running fine and replicating the data
will
send this message to other slaves.
what does the parameter signifies ?
Thanks,
Steven
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l ? As mentioned
here http://activemq.apache.org/replicated-leveldb-store.html that the slave
with the latest update gets promoted to become the master. How does zk
knows which broker has the latest update ? Does zk get notifications from
the slaves for each update ?
Thanks,
Steven
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Hi,
Is it possible to copy data from leveldb store of one broker to another
broker while using replicated leveldb.
For ex. : Let's say 3 brokers are running fine and replicating the data. I
suddenly stop one slave broker. After some time before starting the slave
Can I manually copy le
Please respond
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says that we (let
say 3) ActiveMQ brokers belong to same environment and fighting to become
master.
Thanks,
Anuj
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Sent from the ActiveMQ - User mailing list a
er but I guess
>> the
>> access via JNI may be less optimal than using an embedded Java (or Scala)
>> engine.
>>
>>
>>
>>
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>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>
>
>
q.apache.org/replicated-leveldb-store.html.
>
> What does zookeeper do other than election of master from ActiveMQ brokers ?
> Who takes care of replicating data from master broker to other slaves ?
>
>
> Thanks,
> Anuj
>
>
>
>
> --
> View this message in context:
Hi,
I have gone through
http://activemq.apache.org/replicated-leveldb-store.html.
What does zookeeper do other than election of master from ActiveMQ brokers ?
Who takes care of replicating data from master broker to other slaves ?
Thanks,
Anuj
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Hi,
Does clients need to make any changes or include any jars to connect to
ActiveMQ broker nodes which are using replicated levelDB. Since broker
instances connect to zookeeper to use replicated leveldb so just curious to
know are there any changes required on client side as well apart from
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>
access via JNI may be less optimal than using an embedded Java (or Scala)
engine.
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Quick update:
I have enabled G1GC for the JVM running the broker and since then had no
problem again. The master broker stays master even under very heavy load.
So, my suggestion and recommendation when using replicated LevelDB would be
to use the G1 garbage collector significantly reducing
that and "dump" the messages there rather than in the log file.
I will run some more tests by changing the GC to G1 hopefully avoiding a
full GC and the demotion of the broker to slave forcing a failover.
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gt; After that I can see a ton of exceptions and error messages saying that the
> replicated store has stopped and similar. After some time, it looks the
> broker amq1 has re-stabilized itself and reporting to have been started as
> slave.
>
> I don't know what exactly is
oing on, but it appears that something is
wrong with the replicated LevelDB which needs more investigation.
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is that it is likely to
> be
> a network problem and not an issue within ActiveMQ.
>
> I will follow-up in case the issue shows up again.
>
> Until then, sorry for potentially raising a false alarm.
>
>
>
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raising a false alarm.
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my original post for brevity)
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gt; Three broker form an active/passive cluster using replicated LevelDB store.
> I have installed native LevelDB 1,7.0 accessing it via the JNDI driver.
> The two cluster are forming a network of broker.
> The "networkConnectors" are defined in the activemq.xml files in only one
>
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