Re: [jgroups-users] JGroups cluster being disturbed over the weekend (couple of days of inactivity probably)

On 13/12/16 18:21, Questions/problems related to using JGroups wrote:
> Hi Bela Ban,
>
> We've made a lot of progress with JGroups for our use case, so far.
>
> We currently have a JGroups cluster with about 25 nodes. We actively use
> the cluster during the week and there is very little to no use for the
> cluster during the weekend.
>
> We've been noticing lately that the cluster gets disturbed over the
> weekend. We are guessing probably this happens over some period of
> inactivity.

What's disturbed? Does the cluster fall apart? Do members block? Stack 
trace?


> Is there any configuration parameter around inactivity in the config XML
> file that we should take a closer look?
>
> *More details about our JGroups cluster / config:*
> We are using JGroups 3.6.6.Final.
>             /*<groupId>org.jgroups</groupId>*/
> /*            <artifactId>jgroups</artifactId>*/
> /*            <version>3.6.6.Final</version>*/


Can you try this with 3.6.11?


> We are using MPING for discovery.
> We also have FD and FD_SOCK configured for failure detection.
>
> The following is our configuration file. Please let us know if you find
> any discrepancies in the configuration.
>
> /*<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"*/
> /*        xmlns="urn:org:jgroups"*/
> /*        xsi:schemaLocation="urn:org:jgroups
> http://www.jgroups.org/schema/jgroups.xsd">*/
> /*    <TCP bind_port="7800"*/
> /*         recv_buf_size="${tcp.recv_buf_size:5M}"*/
> /*         send_buf_size="${tcp.send_buf_size:5M}"*/
> /*         max_bundle_size="64K"*/
> /*         max_bundle_timeout="30"*/
> /*         use_send_queues="true"*/
> /*         sock_conn_timeout="300"*/
> /*
> */
> /*         timer_type="new3"*/
> /*         timer.min_threads="4"*/
> /*         timer.max_threads="10"*/
> /*         timer.keep_alive_time="3000"*/
> /*         timer.queue_max_size="500"*/
> /*
> */
> /*         thread_pool.enabled="true"*/
> /*         thread_pool.min_threads="2"*/
> /*         thread_pool.max_threads="8"*/
> /*         thread_pool.keep_alive_time="5000"*/
> /*         thread_pool.queue_enabled="true"*/
> /*         thread_pool.queue_max_size="10000"*/
> /*         thread_pool.rejection_policy="discard"*/
> /*
> */
> /*         oob_thread_pool.enabled="true"*/
> /*         oob_thread_pool.min_threads="1"*/
> /*         oob_thread_pool.max_threads="8"*/
> /*         oob_thread_pool.keep_alive_time="5000"*/
> /*         oob_thread_pool.queue_enabled="false"*/
> /*         oob_thread_pool.queue_max_size="100"*/
> /*         oob_thread_pool.rejection_policy="discard"/>*/
> /*
> */
> /*    <MPING ip_ttl="8"*/
> /*           mcast_addr="224.1.2.3"*/
> /*           mcast_port="7801"*/
> /*           send_on_all_interfaces="true"*/
> /*           receive_on_all_interfaces="true"/>*/
> /*
> */
> /*    <MERGE3  min_interval="10000"*/
> /*             max_interval="30000"/>*/
> /*    <FD_SOCK client_bind_port="40718" start_port="40718"/>*/
> /*    <FD timeout="3000" max_tries="3" />*/
> /*    <VERIFY_SUSPECT timeout="1500"  />*/
> /*    <BARRIER />*/
> /*    <pbcast.NAKACK2 use_mcast_xmit="false"*/
> /*                    discard_delivered_msgs="true"/>*/
> /*    <UNICAST3 />*/
> /*    <pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"*/
> /*                   max_bytes="4M"/>*/
> /*    <pbcast.GMS print_local_addr="true" join_timeout="5000"*/
> /*                view_bundling="true"/>*/
> /*    <MFC max_credits="2M"*/
> /*         min_threshold="0.4"/>*/
> /*    <FRAG2 frag_size="60K"  />*/
> /*    <!--RSVP resend_interval="2000" timeout="10000"/-->*/
> /*    <pbcast.STATE_TRANSFER/>*/
> /*</config>*/
> /*
> */
> /*
> */
> Please let me know if you need more information.
> --
> *Regards,
> *Venkat

-- 
Bela Ban, JGroups lead (http://www.jgroups.org)


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