Filter by Answers and Ideas

rahul
I have a spring based web application hosting on the wildfly server. The web application deployment is failing with below error:   Caused by: java.lang.NoClassDefFoundError: Failed to link com/mapr/hadoop/yarn/util/MapRFSLoggingHandler (Module "org.mapr:main" from local module loader @1c53fd30 (finder: local module finder @50cbc42f (roots:… (Show more)
in Answers
suhaibahmed2
I am trying to create a table in Hbase using as a Spark Dataframe. (from a spark Data frame). The simplified code I am trying is this.   import org.apache.spark.sql.datasources.hbase.HBaseTableCatalog;   #Create a Data frame with two columns and two rows. val df =sc.parallelize(Seq(("1","a"),("2","b"))).toDF(Seq("col1","col2"): _*);    … (Show more)
in Answers
qulino
Dear Mapr Community, I face the 'Volume data unavailable' & 'Volume Low data Replication' on volume containing metrics on 1 node: /var/mapr/local/mycluster_serv1/metrics   One of the volume containers is offline:   maprcli dump containerinfo -ids 2083 -json { "timestamp":1534350208488, "timeofday":"2018-08-15 07:23:28.488 GMT+0300",… (Show more)
in Answers
Azharuddin
I'm trying to reduce noise in a binary python array by removing all completely isolated single cells, i.e. setting "1" value cells to 0 if they are completely surrounded by other "0"s. I have been able to get a working solution by removing blobs with sizes equal to 1 using a loop, but this seems like a very inefficient solution for large arrays:… (Show more)
in Answers
john.humphreys
How can I monitor MapR-DB region splits and packing?  I'd like to know when they start and stop to see if they are responsible for some intermittent slowness we see when using MapR-DB and/or MapR-Streams.   If the answer is Spyglass... is there an alternative way?  We had to disable that due to performance bugs in MapR 5.2.0.
in Answers
da
Currently I am able to replicate data from Oracle-DB to MapR-DB with MapR-Streaming . Oracle -> Oracle GoldenGate (MapR Streaming Client) ->MapR-FS (MapR Streaming data) ->Ab-initio ->MapR DB.   But here I am looking for a solution which can replace Ab-initio. As suggestion ? Can MapR Apache Spark solve the purpose ? How ? any other option ...… (Show more)
in Answers
john.humphreys
When using MapR-DB, MapR-Streams, Spark, etc, all on the same cluster, it is easy to start running into performance bottlenecks.  For example, we frequently see slow-downs when querying or writing to MapR-DB which sometimes last minutes or hours.   The debugging process for these things is extremely uniform and quite painful.  You look for slow…
peterluo95014
Cannot start zookeeper server. Got errors in zookeeper.log   2018-08-16 16:12:58,337 [myid:] - INFO  [ProcessThread(sid:0 cport:-1)::PrepRequestProcessor@627] - Got user-level KeeperException when processing sessionid:0x165438180070001 type:setData cxid:0x56 zxid:0x19e txntype:-1 reqpath:n/a Error… (Show more)
in Answers
dobbyssock87
My team is trying to determine the best practice for storing dates in hive tables. The two options we have debated are storing it as a string in the format yyyymmdd or as a date in the format yyyy-mm-dd (as it most often comes to us from the source). Is there a standard industry best approach? This seems to be especially relevant when your date… (Show more)
in Answers
Sanjay0004
Hi  christina.pedulla, Cathy Liu,   I am submitting the below spark job on Mapr cluster, but I am running into the issue mentioned below:  Also I am not able to see the spark-jobs on UI, the objective is to run spark job using yarn as a resource manager and deploy it under the cluster.   /opt/mapr/spark/spark-2.1.0/bin/spark-submit --class… (Show more)
in Answers
RSS
I'd like to calculate performances of a MapR-FS with and without MapR storage pools. Using TestDFSIO I am getting "weird" results:    without storage pool 18/08/16 11:44:43 INFO fs.TestDFSIO: ----- TestDFSIO ----- : write 18/08/16 11:44:43 INFO fs.TestDFSIO: Date & time: Thu Aug 16 11:44:43 UTC 2018 18/08/16 11:44:43 INFO fs.TestDFSIO: Number…
in Answers
RSS
I have create huge files in MAPRFS however File System used is not increaed.
in Answers
RSS
I have create huge files in MAPRFS however File System used is not increaed.
in Answers
Load more items