Hi Unmesh,
AFAIK, the crashed node has to be downed (whether manually or
automatically) for the cluster to reach convergence.
Only once there are no unreachable nodes observed by any member can the
leader resume it's duties and allow the new member (your re-started
instance) to join.
For testing & dev, you can use auto-downing. For production you need to
choose a more resilient approach I'm afraid, as out of the box
auto-downing doesn't provide a way to address the split-brain-problem
which most likely would bite you in a real life environment sooner or later.
Cheers,
Michal
On 04/04/17 08:31, Unmesh Joshi wrote:
Is it possibly because in a two node cluster, there can never be
majority ( > 50%) nodes agreeing on membership to mark a node as 'seen'?
On Tuesday, 4 April 2017 12:46:17 UTC+5:30, Unmesh Joshi wrote:
Hi,
I have a two node cluster in a cluster. If I crash one of the
nodes (*10.131.22.26:3552 <http://10.131.22.26:3552>), *and bring
it up again, I start getting following messages from other nodes.
Now that the node is reachable and there are only two nodes in
the cluster, why should it give following message with seen=false
for 1*0.131.22.26:3552 <http://0.131.22.26:3552>? *
For members to be seen, is there any other configuration that
needs to be tuned?
[INFO] [04/04/2017 12:38:49.623]
[csw-cluster-akka.actor.default-dispatcher-14]
[akka.cluster.Cluster(akka://csw-cluster)] Cluster Node
[akka.tcp://[email protected]:41574
<http://[email protected]:41574>] - Leader can
currently not perform its duties, reachability status:
[akka.tcp://[email protected]:41574
<http://[email protected]:41574> ->
akka.tcp://[email protected]:3552
<http://[email protected]:3552>: Unreachable
[Unreachable] (1)], member status:
[akka.tcp://[email protected]:3552
<http://[email protected]:3552> Up seen=false,
akka.tcp://[email protected]:41574
<http://[email protected]:41574> Up seen=true]
[INFO] [04/04/2017 12:39:49.634]
[csw-cluster-akka.actor.default-dispatcher-2]
[akka.cluster.Cluster(akka://csw-cluster)] Cluster Node
[akka.tcp://[email protected]:41574
<http://[email protected]:41574>] - Leader can
currently not perform its duties, reachability status:
[akka.tcp://[email protected]:41574
<http://[email protected]:41574> ->
akka.tcp://[email protected]:3552
<http://[email protected]:3552>: Unreachable
[Unreachable] (1)], member
status:*[akka.tcp://[email protected]:3552
<http://[email protected]:3552> Up seen=false*,
akka.tcp://[email protected]:41574
<http://[email protected]:41574> Up seen=true]
[INFO] [04/04/2017 12:40:49.632]
[csw-cluster-akka.actor.default-dispatcher-17]
[akka.cluster.Cluster(akka://csw-cluster)] Cluster Node
[akka.tcp://[email protected]:41574
<http://[email protected]:41574>] - Leader can
currently not perform its duties, reachability status: [akka.t
Thanks,
Unmesh
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
---
You received this message because you are subscribed to the Google
Groups "Akka User List" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to [email protected]
<mailto:[email protected]>.
To post to this group, send email to [email protected]
<mailto:[email protected]>.
Visit this group at https://groups.google.com/group/akka-user.
For more options, visit https://groups.google.com/d/optout.
--
Signature
<http://www.openbet.com/> Michal Borowiecki
Senior Software Engineer L4
T: +44 208 742 1600
+44 203 249 8448
E: [email protected]
W: www.openbet.com <http://www.openbet.com/>
OpenBet Ltd
Chiswick Park Building 9
566 Chiswick High Rd
London
W4 5XT
UK
<https://www.openbet.com/email_promo>
This message is confidential and intended only for the addressee. If you
have received this message in error, please immediately notify the
[email protected] <mailto:[email protected]> and delete it
from your system as well as any copies. The content of e-mails as well
as traffic data may be monitored by OpenBet for employment and security
purposes. To protect the environment please do not print this e-mail
unless necessary. OpenBet Ltd. Registered Office: Chiswick Park Building
9, 566 Chiswick High Road, London, W4 5XT, United Kingdom. A company
registered in England and Wales. Registered no. 3134634. VAT no.
GB927523612
--
Read the docs: http://akka.io/docs/
Check the FAQ: http://doc.akka.io/docs/akka/current/additional/faq.html
Search the archives: https://groups.google.com/group/akka-user
---
You received this message because you are subscribed to the Google Groups "Akka User List" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/akka-user.
For more options, visit https://groups.google.com/d/optout.
