Would it cause problems if I remove it from the "flink-runtime" pom?
Seems strange to have a dependency there that we do not even use... On Wed, Jan 6, 2016 at 12:07 PM, Ufuk Celebi <u...@apache.org> wrote: > @Stephan: It was added to the dependency management section in order to > enforce a higher version for S3 client, because it was causing problems > earlier. > > > On 06 Jan 2016, at 11:14, Chiwan Park <chiwanp...@apache.org> wrote: > > > > Great! Thanks for addressing! > > > >> On Jan 6, 2016, at 5:51 PM, Stephan Ewen <se...@apache.org> wrote: > >> > >> At a first look, I think that "flink-runtime" does not need Apache > Httpclient at all. I'll try to simply remove that dependency... > >> > >> On Wed, Jan 6, 2016 at 7:14 AM, Chiwan Park <chiwanp...@apache.org> > wrote: > >> Hi, > >> > >> Thanks for answering me! > >> > >> It is happy to hear the problem will be addressed. :) > >> > >> About question 2, flink-runtime uses Apache Httpclient 4.2.6 and S3 > file system api implemented by Amazon uses 4.3.x. There are some API > changes, so NoSuchMethodError exception occurs. > >> > >>> On Jan 5, 2016, at 11:59 PM, Stephan Ewen <se...@apache.org> wrote: > >>> > >>> Hi! > >>> > >>> Concerning (1) We have seen that a few times. The JVMs / Threads do > sometimes not properly exit in a graceful way, and YARN is not always able > to kill the process (YARN bug). I am currently working on a refactoring of > the YARN resource manager (to allow to easy addition of other frameworks) > and have addressed this as part of that. Will be in the master in a bit. > >>> > >>> Concerning (2) Do you know which component in Flink uses the HTTP > client? > >>> > >>> Greetings, > >>> Stephan > >>> > >>> > >>> On Tue, Jan 5, 2016 at 2:49 PM, Maximilian Bode < > maximilian.b...@tngtech.com> wrote: > >>> Hi everyone, > >>> > >>> Regarding Q1, I believe I have witnessed a comparable phenomenon in a > (3-node, non-EMR) YARN cluster. After shutting down the yarn session via > `stop`, one container seems to linger around. `yarn application -list` is > empty, whereas `bin/yarn-session.sh -q` lists the left-over container. > Also, there is still one application shown as ‚running‘ in Ambari’s YARN > pane under current applications. Then, after some time (order of a few > minutes) it disappears and the resources are available again. > >>> > >>> I have not tested this behavior extensibly so far. Noticeably, I was > not able to reproduce it by just starting a session and then ending it > again right away without looking at the JobManager web interface. Maybe > this produces some kind of lag as far as YARN containers are concerned? > >>> > >>> Cheers, > >>> Max > >>> > >>>> Am 04.01.2016 um 12:52 schrieb Chiwan Park <chiwanp...@apache.org>: > >>>> > >>>> Hi All, > >>>> > >>>> I have some problems using Flink on Amazon EMR cluster. > >>>> > >>>> Q1. Sometimes, jobmanager container still exists after destroying > yarn session by pressing Ctrl+C. In that case, Flink YARN app seems exited > correctly in YARN RM dashboard. But there is a running container in the > dashboard. From logs of the container, I realize that the container is > jobmanager. > >>>> > >>>> I cannot kill the container because there is no permission to restart > YARN RM in Amazon EMR. In my small Hadoop Cluster (w/3 nodes), the problem > doesn’t appear. > >>>> > >>>> Q2. I tried to use S3 file system in Flink on EMR. But I can’t use it > because of version conflict of Apache Httpclient. In default, > implementation of S3 file system in EMR is > `com.amazon.ws.emr.hadoop.fs.s3n.S3NativeFileSystem` which is linked with > other version of Apache Httpclient. > >>>> > >>>> As I wrote above, I cannot restart Hadoop cluster after modifying > conf-site.xml because of lack of permission. How can I solve this problem? > >>>> > >>>> Regards, > >>>> Chiwan Park > >>>> > >>>> > >> > >> Regards, > >> Chiwan Park > > > > Regards, > > Chiwan Park > > > > > >
