Hi Girish, HA cluster operates when the majority of nodes is available (when "Required Minimum Number Of Nodes" is set to DEFAULT). In 2-node cluster the majority is 2. Thus, when one node goes down, the cluster looses majority and cannot operate even when second node is Ok. It is implemented like this in order to avoid "Split brain scenario".
You can make cluster operational by setting "Allow to Operate Solo" on the remaining node. Please note, that only one node in 2-node cluster can have "Allow to Operate Solo" set on. Alternately, you can set-up 3-node cluster. The 3-nodes cluster continues to operate after loosing one node (due to majority being 2, thus, the election of the Master can be performed). Obviously, when 2 nodes are lost in 3-nodes cluster, the remaining node cannot operate by itself (unless you override "Required Minimum Number Of Nodes" and set it to 1). I hope that the above can help you to understand why node2 goes into WAITING Role and node1 becomes UNREACHABLE on stop of virtual machine for node1. Kind Regards, Alex On 14 July 2017 at 11:41, girish lc <girish...@gmail.com> wrote: > > > Hi Alex, > > Thank you very much for your detailed email, now I'm able to send the > message in the group. > > I had used the below URL with fail over settings, > > connectionfactory.qpidConnectionFactory=amqp://guest:guest@clientid > /hagroup?failover='roundrobin?cyclecount='2''&brokerlist=' > tcp://<node1>:5672?retries='5'&connectdelay='2000';tcp://< > node2>:5672?retries='5'&connectdelay='2000'' > > 1. When I do the flip b/w MASTER and REPLICA, I can see the messages in > the new MASTER(old REPLICA) . > > 2. But when I stop the VM1(node1) system the VM2(node2) goes to WAITING > Role and node1 becomes UNREACHABLE and the message sent to MASTER will not > deliver and gives the below error, > Could you please let me know how to handle the Failover case of MASTER > node OR Is it the correct behavior ??? > > > [image: Inline image 4] > > > > > [image: Inline image 3] > > > > > > On Thu, Jul 13, 2017 at 7:27 PM, Oleksandr Rudyy <oru...@gmail.com> wrote: > >> Hi Girish, >> >> As a simple test you can publish a message into your HA virtual host, flip >> the mastersheep to replica, and consume that message from a new master. >> >> The connection URL you have provided is from JMS client for AMQP 0-x >> protocols [1]. You can use JMS client for AMQP 0-x or switch to newer jms >> client for AMQP 1.0 [2]. >> >> For both JMS client you need to specify a virtual host name in a >> connection >> URL if ha node is not a default one. >> >> For example, AMQP 0-x client connection URL would need to be changed as >> below >> >> connectionfactory.qpidConnectionFactory=amqp://guest:guest@clientid/<ha >> virtual host name>?brokerlist='tcp://localhost:5672' >> >> where <ha virtual host name> is your HA group name. >> >> The format of connection URL for AMQP 0-x client is documented in [2]: >> >> If you need an automatic failover (client reconnects automatically to >> master broker on mastersheep change), you can specify both brokers in a >> connection URL with failover settings, for example >> >> connectionfactory.qpidConnectionFactory=amqp://guest:guest@/<ha virtual >> host name>?failover='roundrobin?cyclecount='2'' >> &brokerlist='tcp://<host1>:<port1>?retries='5'&connectdelay= >> '2000';tcp://<host2>:<port2>?retries='5'&connectdelay='2000'' >> >> For new JMS client please check documentation at [4]. >> >> Kind Regards, >> Alex >> >> [1] http://qpid.apache.org/components/jms/amqp-0-x.html >> [2] http://qpid.apache.org/components/jms/index.html >> [3] >> http://qpid.apache.org/releases/qpid-java-6.1.4/jms-client- >> 0-8/book/JMS-Client-0-8-Connection-URL.html >> [4] https://qpid.apache.org/releases/qpid-jms-0.23.0/docs/index.html >> >> >> >> On 13 July 2017 at 14:36, girish lc <girish...@gmail.com> wrote: >> >> > Hi, >> > >> > I'm able to create group as mentioned in the link, >> > [image: Inline image 1] >> > http://qpid.apache.org/releases/qpid-java-6.1.4/java- >> > broker/book/Java-Broker-High-Availability-CreatingGroup.html >> > >> > Somebody please guide me how to test the HA. >> > >> > Here below are the steps I followed: >> > >> > 1. Created the MASTER node in one VM(1st VM). and added the other VM(2nd >> > VM) details in the permitted address. >> > >> > 2. Created the REPLICA in the 2nd VM and added MASTER node details in >> the >> > permitted address >> > >> > 3. When I was sending the message to the Queue earlier I was using this >> > below line in the config.properties file. >> > >> > connectionfactory.qpidConnectionFactory=amqp://guest:guest@clientid/? >> > brokerlist='tcp://localhost:5672' >> > >> > But now I am not able to send any message to the MASTER node, getting >> the >> > below error. >> > >> > [image: Inline image 2] >> > >> > >> > >> > >> > >> > On Wed, Jul 12, 2017 at 11:13 AM, girish lc <girish...@gmail.com> >> wrote: >> > >> >> Hi Alex, >> >> >> >> I'm following the same link, now I've created one MASTER node and one >> >> REPLICA to form the group, but I am not getting the idea how to use or >> test? >> >> >> >> On Tue, Jul 11, 2017 at 6:25 PM, Oleksandr Rudyy <oru...@gmail.com> >> >> wrote: >> >> >> >>> Girish, >> >>> >> >>> Please following instructions in Qpid documentation [1]. >> >>> >> >>> Kind Regards, >> >>> Alex >> >>> >> >>> [1] >> >>> http://qpid.apache.org/releases/qpid-java-6.1.4/java-broker/ >> >>> book/Java-Broker-High-Availability-CreatingGroup.html >> >>> >> >>> On 11 July 2017 at 11:10, girish lc <girish...@gmail.com> wrote: >> >>> >> >>> > Hi , >> >>> > >> >>> > After changing the port to 5674 (new port) I'm able to create Master >> >>> node >> >>> > :) >> >>> > >> >>> > Working on the REPLICA node, still if any of you have the snapshot >> for >> >>> the >> >>> > same please share, I am not sure how to check the High Availability >> >>> > working, please guide me. >> >>> > >> >>> > On Tue, Jul 11, 2017 at 3:33 PM, girish lc <girish...@gmail.com> >> >>> wrote: >> >>> > >> >>> >> Hi Adel, >> >>> >> >> >>> >> After including the bdb je 5.0.104, I'm still getting the below >> >>> error, if >> >>> >> any of you have already configured could you please send me the >> >>> screen shot. >> >>> >> >> >>> >> [image: Inline image 1] >> >>> >> >> >>> >> On Tue, Jul 11, 2017 at 3:03 PM, Adel Boutros < >> adelbout...@live.com> >> >>> >> wrote: >> >>> >> >> >>> >>> Hello, >> >>> >>> >> >>> >>> >> >>> >>> You can find it on Oracle's website: >> >>> >>> >> >>> >>> http://www.oracle.com/technetwork/database/database-technolo >> >>> >>> gies/berkeleydb/downloads/index-098622.html >> >>> >>> >> >>> >>> >> >>> >>> Regards, >> >>> >>> >> >>> >>> Adel >> >>> >>> >> >>> >>> >> >>> >>> ________________________________ >> >>> >>> From: girish lc <girish...@gmail.com> >> >>> >>> Sent: Tuesday, July 11, 2017 11:04:31 AM >> >>> >>> To: users@qpid.apache.org >> >>> >>> Subject: Re: Qpid High Availability >> >>> >>> >> >>> >>> Hi Alex, >> >>> >>> >> >>> >>> Could you please share me the location from where I can download >> bdb >> >>> je >> >>> >>> 5.0.104, as I'm not able to find. >> >>> >>> >> >>> >>> Many thanks, >> >>> >>> >> >>> >>> On Tue, Jul 11, 2017 at 1:40 PM, Oleksandr Rudyy < >> oru...@gmail.com> >> >>> >>> wrote: >> >>> >>> >> >>> >>> > Hi Girish, >> >>> >>> > >> >>> >>> > I tested HA with bdb je 5.0.73 and got the same error. It >> appears >> >>> that >> >>> >>> je >> >>> >>> > configuration setting "je.cleaner.adjustUtilization" was >> >>> introduced in >> >>> >>> > versions after 5.0.73. Unfortunately, the setting is hard-coded >> in >> >>> the >> >>> >>> Qpid >> >>> >>> > code. In order to resolve the issue you need to upgrade bdb je >> to >> >>> >>> 5.0.104. >> >>> >>> > >> >>> >>> > Kind Regards, >> >>> >>> > Alex >> >>> >>> > >> >>> >>> > On 10 July 2017 at 16:50, girish lc <girish...@gmail.com> >> wrote: >> >>> >>> > >> >>> >>> > > Hi Alex, >> >>> >>> > > >> >>> >>> > > Thank you for the email, >> >>> >>> > > >> >>> >>> > > I'm using the below version: >> >>> >>> > > >> >>> >>> > > qpid-java-6.1.4 >> >>> >>> > > Berkeley DB Java Edition - 5.0.73 >> >>> >>> > > >> >>> >>> > > Please let me know the correct combination. >> >>> >>> > > >> >>> >>> > > On Mon, Jul 10, 2017 at 6:54 PM, Oleksandr Rudyy < >> >>> oru...@gmail.com> >> >>> >>> > wrote: >> >>> >>> > > >> >>> >>> > > > Hi Girish, >> >>> >>> > > > >> >>> >>> > > > What version of bdb je library are you using? >> >>> >>> > > > >> >>> >>> > > > 6.x versions of Qpid Broker are based on bdb je version >> 5.0.104 >> >>> >>> due to >> >>> >>> > > > Oracle license change. >> >>> >>> > > > >> >>> >>> > > > Master and new 7.x versions of the Broker will be based new >> >>> bdb je >> >>> >>> > > versions >> >>> >>> > > > ( 7.3.7 and above), as Oracle started to distribute je with >> >>> dual >> >>> >>> > > licenses - >> >>> >>> > > > one of which is Apache license. >> >>> >>> > > > >> >>> >>> > > > I am guessing that you are trying to start 6.x version of >> >>> Broker >> >>> >>> with >> >>> >>> > bd >> >>> >>> > > je >> >>> >>> > > > 7.3.x. Please, use je version 5.0.104. >> >>> >>> > > > >> >>> >>> > > > Kind Regards, >> >>> >>> > > > Alex >> >>> >>> > > > >> >>> >>> > > > >> >>> >>> > > > On 10 July 2017 at 14:03, Chandrashekar, Girish < >> >>> >>> > > gchandrashe...@wabtec.com >> >>> >>> > > > > >> >>> >>> > > > wrote: >> >>> >>> > > > >> >>> >>> > > > > Hi Team, >> >>> >>> > > > > >> >>> >>> > > > > >> >>> >>> > > > > Could you please help me to setup Qpid High Availability >> >>> >>> > functionality. >> >>> >>> > > > > >> >>> >>> > > > > >> >>> >>> > > > > I am referring the below link, but I am not successful to >> >>> setup; >> >>> >>> in >> >>> >>> > > fact >> >>> >>> > > > I >> >>> >>> > > > > got the "422 - je.cleaner.adjustUtilization is not a valid >> >>> BDBJE >> >>> >>> > > > > environment parameter" error and also I had lost the >> files >> >>> and >> >>> >>> > folders >> >>> >>> > > > > present in my C:\ after this error. I tried the same in 2 >> >>> virtual >> >>> >>> > > > machines >> >>> >>> > > > > and also in my local machine same result 😞 >> >>> >>> > > > > >> >>> >>> > > > > >> >>> >>> > > > > https://qpid.apache.org/releases/qpid-java-6.1.4/java- >> >>> >>> > > > > broker/book/Java-Broker-High-A >> vailability-CreatingGroup.html >> >>> >>> > > > > >> >>> >>> > > > > >> >>> >>> > > > > Can someone let me know the root cause and also please >> help >> >>> me to >> >>> >>> > setup >> >>> >>> > > > > the High Availability functionality. >> >>> >>> > > > > >> >>> >>> > > > > >> >>> >>> > > > > Regards, >> >>> >>> > > > > >> >>> >>> > > > > Girish LC >> >>> >>> > > > > >> >>> >>> > > > > 09886521716 >> >>> >>> > > > > >> >>> >>> > > > > This email and any attachments are only for use by the >> >>> intended >> >>> >>> > > > > recipient(s) and may contain legally privileged, >> >>> confidential, >> >>> >>> > > > proprietary >> >>> >>> > > > > or otherwise private information. Any unauthorized use, >> >>> >>> reproduction, >> >>> >>> > > > > dissemination, distribution or other disclosure of the >> >>> contents >> >>> >>> of >> >>> >>> > this >> >>> >>> > > > > e-mail or its attachments is strictly prohibited. If you >> have >> >>> >>> > received >> >>> >>> > > > this >> >>> >>> > > > > email in error, please notify the sender immediately and >> >>> delete >> >>> >>> the >> >>> >>> > > > > original. Neither this information block, the typed name >> of >> >>> the >> >>> >>> > sender, >> >>> >>> > > > nor >> >>> >>> > > > > anything else in this message is intended to constitute an >> >>> >>> electronic >> >>> >>> > > > > signature unless a specific statement to the contrary is >> >>> >>> included in >> >>> >>> > > this >> >>> >>> > > > > message. >> >>> >>> > > > > >> >>> >>> > > > >> >>> >>> > > >> >>> >>> > > >> >>> >>> > > >> >>> >>> > > -- >> >>> >>> > > Regards, >> >>> >>> > > Girish LC >> >>> >>> > > #09886521716 >> >>> >>> > > >> >>> >>> > >> >>> >>> >> >>> >>> >> >>> >>> >> >>> >>> -- >> >>> >>> Regards, >> >>> >>> Girish LC >> >>> >>> #09886521716 >> >>> >>> >> >>> >> >> >>> >> >> >>> >> >> >>> >> -- >> >>> >> Regards, >> >>> >> Girish LC >> >>> >> #09886521716 >> >>> >> >> >>> > >> >>> > >> >>> > >> >>> > -- >> >>> > Regards, >> >>> > Girish LC >> >>> > #09886521716 >> >>> > >> >>> >> >> >> >> >> >> >> >> -- >> >> Regards, >> >> Girish LC >> >> #09886521716 >> >> >> > >> > >> > >> > -- >> > Regards, >> > Girish LC >> > #09886521716 >> > >> > > > > -- > Regards, > Girish LC > #09886521716 >
