java - How to set offset committed by the consumer group using Spark's Direct Stream for Kafka? -


i trying use spark's direct approach (no receivers) kafka, have following kafka configuration map:

configmap.put("zookeeper.connect","192.168.51.98:2181"); configmap.put("group.id", uuid.randomuuid().tostring()); configmap.put("auto.offset.reset","smallest"); configmap.put("auto.commit.enable","true"); configmap.put("topics","ipdr31"); configmap.put("kafka.consumer.id","kafkasparkuser"); configmap.put("bootstrap.servers","192.168.50.124:9092");

now objective is, if spark pipeline crashes , started again, stream should started latest offset committed consumer group. so, purpose, want specify starting offset consumer. have information offsets committed in each partition. how can supply information streaming function. using

javapairinputdstream<byte[], byte[]> kafkadata =    kafkautils.createdirectstream(js, byte[].class, byte[].class,      defaultdecoder.class, defaultdecoder.class,configmap,topic);

look @ second form of createdirectstream in spark api docs - allows pass in map<topicandpartition, long>, long offset.

note spark not automatically update offsets in zookeeper when using directinputstream - have write them either zk or other database. unless have strict requirement of exactly-once semantics, easier use createstream method dstream, in case spark update offsets in zk , resume last stored offset in case of failure.


Comments

Post a Comment

Popular posts from this blog

toolbar - How to add link to user registration inside toobar in admin joomla 3 custom component -

im trying write component admin side , need add user creation. dont want duplicate existing codes add link. know how add task not simple link toolbar. thx help. if wanting button opens new user screen can try in component: $bar = jtoolbar::getinstance('toolbar'); $bar->appendbutton('link', 'users', 'new user','index.php?option=com_users&task=user.add'); you need add view.html.php file wherever you're creating toolbar. is need?
Read more

linux - disk space limitation when creating war file -

i have 1 gb disk space limitation hosting app , have used 700mb of it. however want create war file directory big (around 600mb) using command : jar -cvf root.war folderpath that's why encounter quota limitation , can't following. i'm looking way delete folder content when it's applying archive conserve disk space take note can't install zip tool in ssh shell ~ the code works on test directories, test first anyway, deletes files. it's not efficient. assumptions: 300mb free space, in destructively compress 600mb folderpath directory. none of files big -- if file in folderpath 300mb or larger, fail. notes: if ' $out ' file exists, nothing. first find pipes file list while , if ' $out ' doesn't exist in loop, create it, don't update -- if does exist, update it. each pass adds 1 more file, deletes unless file directory. after loop finishes delete empty directories too. unset u ; in=folderpath ; out=roo...
Read more