Reconnect to same Zookeeper server with session id fails -


my client application connects zookeeper server , creates ephemeral node:

    zookeeper zk = new zookeeper(hosturl, 40000, null);     if (zk != null) {         try {             zk.create(zpath, "test node".getbytes(),                      zoodefs.ids.open_acl_unsafe, createmode.ephemeral);         } catch (keeperexception e) {             e.printstacktrace();         } catch (interruptedexception e) {             e.printstacktrace();         }     }

if client application crashes , restarts within session timeout period, want reconnect same zookeeper server session id received previous session:

    zookeeper zk = new zookeeper(hosturl, 40000, null, previoudsessionid, null);

however, when try session expired exception:

12:20:26.737 [main-sendthread(172.20.34.24:2181)] info  org.apache.zookeeper.clientcnxn - opening socket connection server 172.20.34.24/172.20.34.24:2181. not attempt authenticate using sasl (unknown error) 12:20:26.737 [main-sendthread(172.20.34.24:2181)] info  org.apache.zookeeper.clientcnxn - socket connection established, initiating session, client: /172.20.34.57:50462, server: 172.20.34.24/172.20.34.24:2181 12:20:26.737 [main-sendthread(172.20.34.24:2181)] debug org.apache.zookeeper.clientcnxn - session establishment request sent on 172.20.34.24/172.20.34.24:2181 12:20:26.737 [main-sendthread(172.20.34.24:2181)] info  org.apache.zookeeper.clientcnxn - unable reconnect zookeeper service, session 0x157ff4a59300008 has expired, closing socket connection 12:20:26.747 [main-eventthread] error org.apache.zookeeper.clientcnxn - error while calling watcher  java.lang.nullpointerexception: null     @ org.apache.zookeeper.clientcnxn$eventthread.processevent(clientcnxn.java:553) [zookeeper-3.5.1-alpha.jar:3.5.1-alpha-1693007]     @ org.apache.zookeeper.clientcnxn$eventthread.run(clientcnxn.java:528) [zookeeper-3.5.1-alpha.jar:3.5.1-alpha-1693007] 12:20:26.747 [main-eventthread] info  org.apache.zookeeper.clientcnxn - eventthread shut down session: 0x157ff4a59300008 org.apache.zookeeper.keeperexception$sessionexpiredexception: keepererrorcode = session expired /ephemeral     @ org.apache.zookeeper.keeperexception.create(keeperexception.java:131)     @ org.apache.zookeeper.keeperexception.create(keeperexception.java:51)     @ org.apache.zookeeper.zookeeper.create(zookeeper.java:1209)     @ curatorexp.zookeeperexp.reconnectwithsessionid(zookeeperexp.java:53)     @ curatorexp.zookeeperexp.main(zookeeperexp.java:24)

even after getting exception, if check zookeeper server using shell, see ephemeral node created before crash. (i have ensured reconnecting before session timeout of 40 seconds)

is expected work?


-

Comments

Post a Comment

Popular posts from this blog

python - How to insert QWidgets in the middle of a Layout? -

Image
i'm using qt framework build graphical user interface. use qgridlayout position qwidgets neatly. gui looks this: my application regularly adds new widgets gui @ runtime. these new widgets not added @ end of qlayout, somewhere in middle. the procedure bit cumbersome. applied on figure above, need take out widg_c , widg_d , ... qgridlayout. next, add widg_x and widg_y , , put other widgets again. how remove widgets qgridlayout: for in reversed(range(mygridlayout.count())): self.itemat(i).widget().setparent(none) ### as long you're dealing small amount of widgets, procedure not disaster. in application display lot of small widgets - perhaps 50 or more! application freezes second while procedure ongoing, annoying user. there way insert widgets somewhere in qlayout, without need take out other widgets? edit: apparently solution qvboxlayout simple. use function insertwidget(..) instead of addwidget(..) . docs can found link: http://doc.qt.io/qt-5/qboxlayou
Read more

python - serve multiple gunicorn django instances under nginx ubuntu -

i need serve 2 webs apps (django) on gunicorn under different domain names using nginx on ubuntu. started using tutorial: https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-16-04 it worked fine 1 using that. tried same thing second gives me 502 gateway second domain. tried following tutorial: http://michal.karzynski.pl/blog/2013/10/29/serving-multiple-django-applications-with-nginx-gunicorn-supervisor/ i'm @ part run gunicorn start script: sudo bin/gunicorn_start i response: starting webuildblack root traceback (most recent call last): file "/home/devin/webuildblack/bin/gunicorn", line 7, in <module> gunicorn.app.wsgiapp import run importerror: no module named 'gunicorn.app'; 'gunicorn' not package you have named program gunicorn.py gunicorn -package. rename file , remove gunicorn.pyc file.
Read more

module - Prestashop displayPaymentReturn hook url -

i new prestashop developer , trying create paymentmodule. have got show payment method can not proceed purchase because not know hot works. does know should redirect run hooddisplaypaymentreturn method? i happy if explain me complete navigation map make purchase. anyway, can find relation between hooks , pages? when have new module payment rely on simplest provided prestashop: bankwire. inside can find 3 hooks. hookpayment: public function hookpayment($params) { if (!$this->active) return; if (!$this->checkcurrency($params['cart'])) return; $this->smarty->assign(array( 'this_path' => $this->_path, 'this_path_bw' => $this->_path, 'this_path_ssl' => tools::getshopdomainssl(true, true).__ps_base_uri__.'modules/'.$this->name.'/' )); return $this->display(__file__, 'payment.tpl'); } hookdisplaypaymenteu: public fun
Read more