On 22/08/16 10:23, Manohar SL wrote:
> Hi Bela Ban,
>
> Thanks for the input points.
>
> Answers are highlighted below:
>
> 1: What does the NPE cause? Incorrect behavior? This is in the discovery
> protocol, so I don't think it is a severe error.
> Actually, we need the Replication Mode of Infinispan, but after
> Upgrading to Infinispan 8.2.2, the replication mode is not working.
> The data updated in Infinispan is getting written to only the local
> node and not replicated to other nodes in the Cluster (we have deployed 3
> Nodes).
> Since we saw the NPE in JGroups, we suspected this could be the reason
> for the Replication not functioning as expected, as it also complains of not
> being able to send data to the other nodes in the Cluster.
OK
> 2: If you change the JGroups code to print the exception (or set a breakpoint
> and debug) we'd know what the cause is.
> Our understating based on the JGroups code analysis, in the context of
> this issue, is:
> => In the BaseServer.java file, the below method tries to send
> data to the other Nodes:
> public void send(Address dest, byte[] data, int offset,
> int length) throws Exception
> The below logic is not able to retrieve the Connection
> Object:
> ------------------------------------------------------------------------------------------------------------------------
> // Get a connection (or create one if not yet existent) and send the data
> Connection conn=null;
> try {
> conn=getConnection(dest);
> conn.send(data, offset, length);
> }
> catch(Exception ex) {
> removeConnectionIfPresent(dest, conn);
> throw ex;
> }
> ------------------------------------------------------------------------------------------------------------------------
> This eventually leads to the NPE.
Insert a ex.printStackTrace() statement in the catch clause.
> 3: Does Infinispan 8.2.2 use JGroups 3.6.8, or did you upgrade JGroups?
> Infinispan 8.2.2 by default uses JGroups 3.6.7, but we tried upgrading
> to JGroups 3.6.8.
Then 3.6.8 may not be supported. I'm sure REPL mode wa tested before
releasing 8.2.2, so perhaps 3.6.8 doesn't work with 8.2.2...
> 4: Is this reproduceable? If yes, goto step #2
> Yes, this is consistently reproducible.
>
> It would be really helpful if you could kindly mail us working JGroups
> configuration with Infinispan 8.2.2 version.
Well, I suggest take the TCP based config shipped with 8.2.2 and use it
as base, ie. make changes to it.
> Also, if you see any issues with our current set of configurations,
> highlighted in the below mail, please let us know the needed changes to this.
>
> Thanks again for all the help.
>
> Regs,
> Manohar
>
>
> -----Original Message-----
> From: Bela Ban [mailto:b...@redhat.com]
> Sent: Monday, August 22, 2016 1:31 PM
> To: Manohar SL <manohar...@ericsson.com>; infinispan -Dev List
> <infinispan-dev@lists.jboss.org>
> Cc: Sathish Kumar Tippeshappa <sathish.kumar.tippesha...@ericsson.com>
> Subject: Re: JGroups Error: JGRP000029 observed with "JGroups 3.6.8 +
> Infinispan 8.2.2":
>
> 1: What does the NPE cause? Incorrect behavior? This is in the discovery
> protocol, so I don't think it is a severe error.
>
> 2: If you change the JGroups code to print the exception (or set a breakpoint
> and debug) we'd know what the cause is.
>
> 3: Does Infinispan 8.2.2 use JGroups 3.6.8, or did you upgrade JGroups?
>
> 4: Is this reproduceable? If yes, goto step #2
>
>
>
> On 20/08/16 09:38, Manohar SL wrote:
>> Hi Bela Ban,
>>
>> We have been trying to use JGroups 3.6.8 with Infinispan 8.2.2., in this
>> context we are observing an issue with the Replication Mode of Infinispan
>> usage.
>> We see the below exception from Jgroups:
>> JGRP000029: failed sending message to <>:7800 (100 bytes):
>> java.lang.NullPointerException, headers: TCPGOSSIP:
>> [type=GET_MBRS_REQ, cluster=x-cluster], TP: [cluster_name=x-cluster]
>>
>> The configurations used are highlighted below:
>>
>> Infinispan config
>>
>> <infinispan>
>>
>> <jgroups>
>>
>> <stack-file name="configurationFile"
>> path="config/jgroups.xml"/>
>>
>> </jgroups>
>>
>> <cache-container>
>>
>> <transport cluster="x-cluster" stack="configurationFile" />
>>
>> <replicated-cache name="transactional-type" mode="SYNC">
>>
>> <transaction mode="NON_XA" locking="OPTIMISTIC"
>> transaction-manager-lookup="org.infinispan.transaction.lookup.JBossSta
>> ndaloneJTAManagerLookup" auto-commit="true" />
>>
>> <locking acquire-timeout="60000"/>
>>
>> <expiration lifespan="43200000"/>
>>
>> </replicated-cache>
>>
>> </cache-container>
>>
>> </infinispan>
>>
>>
>>
>> Jgroups configuration
>>
>> <!--
>>
>> TCP based stack, with flow control and message bundling. This is
>> usually used when IP
>>
>> multicasting cannot be used in a network, e.g. because it is disabled
>> (routers discard multicast).
>>
>> Note that TCP.bind_addr and TCPPING.initial_hosts should be set,
>> possibly via system properties, e.g.
>>
>> -Djgroups.bind_addr=192.168.5.2 and
>> -Djgroups.tcpping.initial_hosts=192.168.5.2[7800]".
>>
>> author: Bela Ban
>>
>> -->
>>
>> <config xmlns="urn:org:jgroups"
>>
>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>>
>> xsi:schemaLocation="urn:org:jgroups
>> http://www.jgroups.org/schema/jgroups-3.6.xsd";>
>>
>>
>>
>> <TCP loopback="true"
>>
>> bind_addr="${jgroups.tcp.address:127.0.0.1}"
>>
>> bind_port="${jgroups.tcp.port:7800}"
>>
>> recv_buf_size="${tcp.recv_buf_size:20M}"
>>
>> send_buf_size="${tcp.send_buf_size:640K}"
>>
>> discard_incompatible_packets="true"
>>
>> max_bundle_size="64K"
>>
>> max_bundle_timeout="30"
>>
>> enable_bundling="true"
>>
>> use_send_queues="true"
>>
>> sock_conn_timeout="300"
>>
>> timer_type="new"
>>
>> 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="30"
>>
>> thread_pool.keep_alive_time="60000"
>>
>> thread_pool.queue_enabled="false"
>>
>> thread_pool.queue_max_size="100"
>>
>> thread_pool.rejection_policy="discard"
>>
>> oob_thread_pool.enabled="true"
>>
>> oob_thread_pool.min_threads="2"
>>
>> oob_thread_pool.max_threads="30"
>>
>> oob_thread_pool.keep_alive_time="60000"
>>
>> oob_thread_pool.queue_enabled="false"
>>
>> oob_thread_pool.queue_max_size="100"
>>
>> oob_thread_pool.rejection_policy="discard"/>
>>
>>
>>
>> <!-- <TCP_NIO -->
>>
>> <!-- bind_port="7800" -->
>>
>> <!-- bind_interface="${jgroups.tcp_nio.bind_interface:bond0}" -->
>>
>> <!-- use_send_queues="true" -->
>>
>> <!-- sock_conn_timeout="300" -->
>>
>> <!-- reader_threads="3" -->
>>
>> <!-- writer_threads="3" -->
>>
>> <!-- processor_threads="0" -->
>>
>> <!-- processor_minThreads="0" -->
>>
>> <!-- processor_maxThreads="0" -->
>>
>> <!-- processor_queueSize="100" -->
>>
>> <!-- processor_keepAliveTime="9223372036854775807"/> -->
>>
>> <TCPGOSSIP initial_hosts="${jgroups.tcpgossip.initial_hosts}"/>
>>
>> <!-- <TCPPING async_discovery="true"
>> initial_hosts="${jgroups.tcpping.initial_hosts}"
>>
>> port_range="2" timeout="3000" /> -->
>>
>> <MERGE2 max_interval="30000" min_interval="10000"/>
>>
>> <FD_SOCK/>
>>
>> <FD timeout="3000" max_tries="3"/>
>>
>> <VERIFY_SUSPECT timeout="1500"/>
>>
>> <pbcast.NAKACK
>>
>> use_mcast_xmit="false"
>>
>> retransmit_timeout="300,600,1200,2400,4800"
>>
>> discard_delivered_msgs="false"/>
>>
>> <UNICAST2 timeout="300,600,1200"
>>
>> stable_interval="5000"
>>
>> max_bytes="1m"/>
>>
>> <pbcast.STABLE stability_delay="500" desired_avg_gossip="5000"
>> max_bytes="1m"/>
>>
>> <pbcast.GMS print_local_addr="false" join_timeout="3000"
>> view_bundling="true"/>
>>
>> <UFC max_credits="200k" min_threshold="0.20"/>
>>
>> <MFC max_credits="200k" min_threshold="0.20"/>
>>
>> <FRAG2 frag_size="60000"/>
>>
>> <RSVP timeout="60000" resend_interval="500"
>> ack_on_delivery="false" />
>>
>> </config>
>>
>> Any help on this would be really great.
>> Kindly let us know if you would need any further information on this.
>>
>> Regs,
>> Manohar.
>>
>
> --
> Bela Ban, JGroups lead (http://www.jgroups.org)
>
--
Bela Ban, JGroups lead (http://www.jgroups.org)
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