On Thu, Apr 29, 2010 at 8:49 AM, Patrick Hunt <ph...@apache.org> wrote:
> This is not foolproof however. We found that in general this would work,
> however there were some infrequent cases where a restarted server would fail
> to initialize due to the following issue:
> "it is possible for the process to complete before the kernel has released
> the associated network resource, and this port cannot be bound to another
> process until the kernel has decided that it is done."
> more detail here:
> as a result we ended up changing the test code to start each test with new
> quorum/election port numbers. This fixed the problem for us but would not be
> a solution in your case.
I am not an expert at all on this, but I have used SO_REUSEADDR in other
situations to avoid the address in use problem. Would that help here?
> On 04/29/2010 07:13 AM, Vishal K wrote:
>> Hi Ted,
>> We want the application that embeds the ZK server to be running even after
>> the ZK server is shutdown. So we don't want to restart the application.
>> Also, we prefer not to use zkServer.sh/zkServer.cmd because these are OS
>> dependent (our application will run on Win as well as Linux). Instead, we
>> thought that calling QuorumPeerMain.initializeAndRun() and
>> QuorumPeerMain.shutdown() will suffice to start and shutdown a ZK server
>> we won't have to worry about checking the OS.
>> Is there way to cleanly shutdown the ZK server (by invoking ZK server API)
>> when it is embedded in the application without actually restarting the
>> application process?
>> On Thu, Apr 29, 2010 at 1:54 AM, Ted Dunning<ted.dunn...@gmail.com>
>> Hmmm.... it isn't quite clear what you mean by restart without
>>> Why is killing the server and restarting it not an option?
>>> It is common to do a rolling restart on a ZK cluster. Just restart one
>>> server at a time. This is often used during system upgrades.
>>> On Wed, Apr 28, 2010 at 8:22 PM, Vishal K<vishalm...@gmail.com> wrote:
>>>> What is a good way to restart a ZK server (standalone and quorum)
>>>> having to restart it?
>>>> Currently, I have ZK server embedded in another java application.