Hm. These directories shouldn't be created if using only an in memory
store. Can you print your topology?
On Wed, Jul 17, 2019 at 11:02 AM Muhammed Ashik <ashi...@gmail.com> wrote:
> Hi I just did `du -mh` on `\tmp\kafka-streams` below are the folders listed
> with some .lock files inside.
> not sure if these are coming from rocksdb.. and looks like the sizes of
> these files are less.
>
> 4.0K ./buzzard.MonitoringSeWlanStatsAggregator/0_5
> 4.0K ./buzzard.MonitoringSeWlanStatsAggregator/0_3
> 4.0K ./buzzard.MonitoringSeWlanStatsAggregator/0_2
> 4.0K ./buzzard.MonitoringSeWlanStatsAggregator/1_4
> 4.0K ./buzzard.MonitoringSeWlanStatsAggregator/0_1
> 4.0K ./buzzard.MonitoringSeWlanStatsAggregator/0_4
> 28K ./buzzard.MonitoringSeWlanStatsAggregator
> 32K .
>
>
>
> On Wed, Jul 17, 2019 at 11:18 PM Sophie Blee-Goldman <sop...@confluent.io>
> wrote:
>
> > Hm. Just to be absolutely sure, could you try throwing an exception or
> > something in your RocksDBConfigSetter?
> >
> > On Wed, Jul 17, 2019 at 10:43 AM Muhammed Ashik <ashi...@gmail.com>
> wrote:
> >
> > > I can confirm the /tmp/kafka-streams doesn't have any data related to
> > > rocksdb.
> > >
> > > On Wed, Jul 17, 2019 at 11:11 PM Sophie Blee-Goldman <
> > sop...@confluent.io>
> > > wrote:
> > >
> > > > You can describe your topology to see if there are any state stores
> in
> > it
> > > > that you aren't aware of. Alternatively you could check out the state
> > > > directory (/tmp/kafka-streams by default) and see if there is any
> data
> > in
> > > > there
> > > >
> > > > On Wed, Jul 17, 2019 at 10:36 AM Muhammed Ashik <ashi...@gmail.com>
> > > wrote:
> > > >
> > > > > Thanks How can I verify If there is some data really going on
> rocksdb
> > > > > I tried printing the statistics with no success.
> > > > >
> > > > > class CustomRocksDBConfig extends RocksDBConfigSetter {
> > > > > override def setConfig(storeName: String, options: Options,
> > configs:
> > > > > util.Map[String, AnyRef]): Unit = {
> > > > >
> > > > > val stats = new Statistics
> > > > > stats.setStatsLevel(StatsLevel.ALL)
> > > > > options.setStatistics(stats)
> > > > > .setStatsDumpPeriodSec(600)
> > > > > options
> > > > > .setInfoLogLevel(InfoLogLevel.INFO_LEVEL)
> > > > > options.setDbLogDir("/tmp/dump")
> > > > >
> > > > > }
> > > > > }
> > > > >
> > > > >
> > > > > and included in the stream config ..
> > > > >
> > > > > settings.put(StreamsConfig.ROCKSDB_CONFIG_SETTER_CLASS_CONFIG,
> > > > > classOf[CustomRocksDBConfig])
> > > > >
> > > > >
> > > > > Regards
> > > > > Ashik
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > On Wed, Jul 17, 2019 at 10:52 PM Sophie Blee-Goldman <
> > > > sop...@confluent.io>
> > > > > wrote:
> > > > >
> > > > > > Sorry, didn't see the "off-heap" part of the email. Are you using
> > any
> > > > > > stateful DSL operators? The default stores are persistent, so you
> > may
> > > > > have
> > > > > > a RocksDB store in your topology without explicitly using one.
> > > > > >
> > > > > > On Wed, Jul 17, 2019 at 10:12 AM Sophie Blee-Goldman <
> > > > > sop...@confluent.io>
> > > > > > wrote:
> > > > > >
> > > > > > > If you are using inMemoryKeyValueStore, the records are stored
> by
> > > > > > > definition in memory. RocksDB is not used at all. This store
> will
> > > > > > continue
> > > > > > > to grow proportionally to your keyspace. If you do not have
> > > > sufficient
> > > > > > > memory to hold your entire dataset in memory, consider adding
> > > another
> > > > > > > instance or switching to the RocksDB store
> > > > > > >
> > > > > > > On Wed, Jul 17, 2019 at 6:22 AM Muhammed Ashik <
> > ashi...@gmail.com>
> > > > > > wrote:
> > > > > > >
> > > > > > >> Kafka Streams version - 2.0.0
> > > > > > >>
> > > > > > >> Hi, in our streaming instance we are observing a steady growth
> > in
> > > > the
> > > > > > >> off-heap memory (out of 2gb allocated memory 1.3 is reserved
> for
> > > > heap
> > > > > > >> memory and the ~700mb memory is utilised over a time of ~6hrs
> > and
> > > > the
> > > > > > >> process is OOM killed eventually).
> > > > > > >>
> > > > > > >> we are using only the inMemoryKeyValueStore and not doing any
> > > > > > persistence.
> > > > > > >> as suggested the iterators are closed at the places it is
> > > used(using
> > > > > it
> > > > > > in
> > > > > > >> only once).
> > > > > > >>
> > > > > > >> Some forums were relating such issues with rocksdb but we are
> > not
> > > > > > >> specifying rocksdb in the config explicitly though. I was not
> > sure
> > > > > > whether
> > > > > > >> it is used as a default in memory store by kafka streams.
> > > > > > >>
> > > > > > >> Regards
> > > > > > >> Ashik
> > > > > > >>
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
