> Is there any way to distinguish CONTAINER and PERSISTENT nodes > programatically using Zookeeper client?
Unfortunately, not currently. We've talked about adding APIs to get the node type but it hasn't been done yet. I forget if there is an existing ticket tracking this. > Strangely enough, Zookeeper server must have some way to distinguish the > containers, because they are automatically reaped after > "znode.container.maxNeverUsedIntervalMs" Interval (I'm using versión 3.6.0). > So, ¿any way to find out which znodes are containers in the client side? Containers have the high bit of ephemeralOwner set but that is masked when sending Stat to the client so clients have no way of knowing this. -Jordan > On Apr 8, 2020, at 8:43 AM, ARITZ BASTIDA OJANGUREN > <[email protected]> wrote: > > Is there any way to distinguish CONTAINER and PERSISTENT nodes > programatically using Zookeeper client? > > We can specify either of the two using CREATE_MODE: > > zookeeper.create("/containerNode", new byte[0], > ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.CONTAINER); > zookeeper.create("/persistentNode", new byte[0], > ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); > > But I see no way to distinguish the two of them via zookeeper client, once > they are created. The stats seem to be equal. Even the ephemeralOwner is 0x0 > in both cases, which is strange, because, according to the documentation, it > should be 0x8000000000000000L for containers > (https://zookeeper.apache.org/doc/r3.5.5/api/org/apache/zookeeper/server/EphemeralType.html). > > Strangely enough, Zookeeper server must have some way to distinguish the > containers, because they are automatically reaped after > "znode.container.maxNeverUsedIntervalMs" Interval (I'm using versión 3.6.0). > So, ¿any way to find out which znodes are containers in the client side? > > [zk: localhost(CONNECTED) 24] get -s /containerNode > cZxid = 0x100000035 > ctime = Wed Apr 08 10:27:07 UTC 2020 > mZxid = 0x100000035 > mtime = Wed Apr 08 10:27:07 UTC 2020 > pZxid = 0x100000035 > cversion = 0 > dataVersion = 0 > aclVersion = 0 > ephemeralOwner = 0x0 > dataLength = 0 > numChildren = 0 > > > Thank you and regards, > Aritz > > ________________________________ > > Este mensaje y sus adjuntos se dirigen exclusivamente a su destinatario, > puede contener información privilegiada o confidencial y es para uso > exclusivo de la persona o entidad de destino. Si no es usted. el destinatario > indicado, queda notificado de que la lectura, utilización, divulgación y/o > copia sin autorización puede estar prohibida en virtud de la legislación > vigente. Si ha recibido este mensaje por error, le rogamos que nos lo > comunique inmediatamente por esta misma vía y proceda a su destrucción. > > The information contained in this transmission is privileged and confidential > information intended only for the use of the individual or entity named > above. If the reader of this message is not the intended recipient, you are > hereby notified that any dissemination, distribution or copying of this > communication is strictly prohibited. If you have received this transmission > in error, do not read it. Please immediately reply to the sender that you > have received this communication in error and then delete it. > > Esta mensagem e seus anexos se dirigem exclusivamente ao seu destinatário, > pode conter informação privilegiada ou confidencial e é para uso exclusivo da > pessoa ou entidade de destino. Se não é vossa senhoria o destinatário > indicado, fica notificado de que a leitura, utilização, divulgação e/ou cópia > sem autorização pode estar proibida em virtude da legislação vigente. Se > recebeu esta mensagem por erro, rogamos-lhe que nos o comunique imediatamente > por esta mesma via e proceda a sua destruição
