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From francexo83 <>
Subject Spark and HBase join issue
Date Sat, 14 Mar 2015 17:52:17 GMT
Hi all,

I have the following  cluster configurations:

   - 5 nodes on a cloud environment.
   - Hadoop 2.5.0.
   - HBase 0.98.6.
   - Spark 1.2.0.
   - 8 cores and 16 GB of ram on each host.
   - 1 NFS disk with 300 IOPS  mounted on host 1 and 2.
   - 1 NFS disk with 300 IOPS  mounted on  host 3,4 and 5.

I tried  to run  a spark job in cluster mode that computes the left outer
join between two hbase tables.
The first table  stores  about 4.1 GB of data spread across  3 regions with
Snappy compression.
The second one stores  about 1.2 GB of data spread across  22 regions with
Snappy compression.

I sometimes get executor lost during in the shuffle phase  during the last
stage (saveAsHadoopDataset).

Below my spark conf:

        num-cpu-cores = 20
        memory-per-node = 10G
        spark.scheduler.mode = FAIR
        spark.scheduler.pool = production
        spark.shuffle.spill= true
        spark.rdd.compress = true

Are  the resource to low to handle this  kind of operation?

if yes, could you share with me the right configuration to perform this
kind of task?

Thank you in advance.


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