Andor,
It didnt work, my OS is resolving to new IP but for some reason zk processes is still resolving to old IP address even with those two properties. Any other pointers? Thanks, Ram On Wed, Jan 22, 2020 at 1:18 PM Andor Molnar <an...@apache.org> wrote: > Yep, give it a try. > > > https://cr.openjdk.java.net/~iris/se/11/latestSpec/api/java.base/java/net/doc-files/net-properties.html > > I don't have personal experience with these settings. > > Andor > > > > > On Wed, 2020-01-22 at 10:37 -0800, rammohan ganapavarapu wrote: > > Hi Andor, > > > > On OS side the hostname resolves to new IP, so it could be JVM is > > the one > > caching. Any setting son jvm to invalidate cache? In some other posts > > i did > > see some one recommending these but not sure it it works. > > > > -Dnetworkaddress.cache.ttl=0 > > > > -Dnetworkaddress.cache.negative.ttl=0 > > > > Ram > > > > On Wed, Jan 22, 2020 at 2:03 AM Andor Molnar <an...@apache.org> > > wrote: > > > > > Hi Ram, > > > > > > As far as I can see from the code, ZooKeeper uses the standard Java > > > calls > > > getByName() and getAllByName() every time it’s trying to connect to > > > a > > > server. > > > > > > ———————— > > > // zookeeper.ipReachableTimeout is not defined > > > if (ipReachableTimeout <= 0) { > > > address = InetAddress.getByName(this.hostname); > > > } else { > > > address = getReachableAddress(this.hostname, > > > ipReachableTimeout); > > > } > > > ———————— > > > > > > ZK doesn’t (and definitely should not) cache IP addresses. It’s > > > either the > > > cache of JVM or your DNS server. > > > > > > Dynamic reconfig is available in 3.5.x versions which are already > > > stable > > > now and I think with that you don’t need to reuse existing > > > hostnames. > > > Instead use reconfig commands to properly remove old nodes and add > > > new > > > ones. Sounds like more cumbersome, but maybe more reliable. > > > > > > Andor > > > > > > > > > > > > > > > > On 2020. Jan 21., at 23:14, rammohan ganapavarapu < > > > rammohanga...@gmail.com> wrote: > > > > But still happening for me, is there any config on zookeeper side > > > > to make > > > > this fix to work? > > > > > > > > Ram > > > > > > > > On Tue, Jan 21, 2020 at 2:12 PM Michael Han <h...@apache.org> > > > > wrote: > > > > > > > > > Could be ZOOKEEPER-1506, though this should be fixed already in > > > > > 3.4.14. > > > > > > > > > > On Tue, Jan 21, 2020 at 2:01 PM rammohan ganapavarapu < > > > > > rammohanga...@gmail.com> wrote: > > > > > > > > > > > Hi Enrico, > > > > > > > > > > > > I see same with both 3.4.5 and 3.4.14 > > > > > > > > > > > > Ram > > > > > > > > > > > > On Tue, Jan 21, 2020 at 1:53 PM Enrico Olivelli < > > > > > > eolive...@gmail.com> > > > > > > wrote: > > > > > > > > > > > > > Hi, > > > > > > > Which version of ZK are you using? > > > > > > > Enrico > > > > > > > > > > > > > > > > > > > > > Il mar 21 gen 2020, 22:51 rammohan ganapavarapu < > > > > > rammohanga...@gmail.com > > > > > > > ha scritto: > > > > > > > > > > > > > > > Hi, > > > > > > > > > > > > > > > > Does zookeeper cache the host IP? if so how long does it > > > > > > > > cache? I > > > > > have > > > > > > a > > > > > > > > zk cluster in autoscaling groups and when a new node > > > > > > > > comes up, other > > > > > > > nodes > > > > > > > > still resolving to old IP. Is there any setting to > > > > > > > > invalidate dns > > > > > cache > > > > > > > for > > > > > > > > zookeeper? or is it jvm dns cache? until other nodes > > > > > > > > resolves to new > > > > > > IP, > > > > > > > > this node not able to join the cluster. > > > > > > > > > > > > > > > > Thanks, > > > > > > > > Ram > > > > > > > > > >
