问题
I'm using Spark 1.6.1, Cassandra 2.2.3 and Cassandra-Spark connector 1.6. .
I already tried to write to multi node cluster but with replication_factor:1.
Now, I'm trying to write to 6-node cluster with one seed one and keyspace which has replication_factor > 1 but Spark is not responding and he is refusing to do that.
As I mention, it works when I'm writing to coordinator with keyspace set to 1.
This is an log which I'm getting and it always stops here or after half an hour he starts to cleaning accumulators and stops on fourth again.
16/08/16 17:07:03 INFO NettyUtil: Found Netty's native epoll transport in the classpath, using it
16/08/16 17:07:04 INFO Cluster: New Cassandra host /127.0.0.1:9042 added
16/08/16 17:07:04 INFO LocalNodeFirstLoadBalancingPolicy: Added host 127.0.0.1 (datacenter1)
16/08/16 17:07:04 INFO Cluster: New Cassandra host /127.0.0.2:9042 added
16/08/16 17:07:04 INFO LocalNodeFirstLoadBalancingPolicy: Added host 127.0.0.2 (datacenter1)
16/08/16 17:07:04 INFO Cluster: New Cassandra host /127.0.0.3:9042 added
16/08/16 17:07:04 INFO LocalNodeFirstLoadBalancingPolicy: Added host 127.0.0.3 (datacenter1)
16/08/16 17:07:04 INFO Cluster: New Cassandra host /127.0.0.4:9042 added
16/08/16 17:07:04 INFO LocalNodeFirstLoadBalancingPolicy: Added host 127.0.0.4 (datacenter1)
16/08/16 17:07:04 INFO Cluster: New Cassandra host /127.0.0.5:9042 added
16/08/16 17:07:04 INFO LocalNodeFirstLoadBalancingPolicy: Added host 127.0.0.5 (datacenter1)
16/08/16 17:07:04 INFO Cluster: New Cassandra host /127.0.0.6:9042 added
16/08/16 17:07:04 INFO CassandraConnector: Connected to Cassandra cluster: Test Cluster
16/08/16 17:07:05 INFO SparkContext: Starting job: take at CassandraRDD.scala:121
16/08/16 17:07:05 INFO DAGScheduler: Got job 3 (take at CassandraRDD.scala:121) with 1 output partitions
16/08/16 17:07:05 INFO DAGScheduler: Final stage: ResultStage 4 (take at CassandraRDD.scala:121)
16/08/16 17:07:05 INFO DAGScheduler: Parents of final stage: List()
16/08/16 17:07:05 INFO DAGScheduler: Missing parents: List()
16/08/16 17:07:05 INFO DAGScheduler: Submitting ResultStage 4 (CassandraTableScanRDD[17] at RDD at CassandraRDD.scala:18), which has no missing parents
16/08/16 17:07:05 INFO MemoryStore: Block broadcast_7 stored as values in memory (estimated size 8.3 KB, free 170.5 KB)
16/08/16 17:07:05 INFO MemoryStore: Block broadcast_7_piece0 stored as bytes in memory (estimated size 4.2 KB, free 174.7 KB)
16/08/16 17:07:05 INFO BlockManagerInfo: Added broadcast_7_piece0 in memory on localhost:43680 (size: 4.2 KB, free: 756.4 MB)
16/08/16 17:07:05 INFO SparkContext: Created broadcast 7 from broadcast at DAGScheduler.scala:1006
16/08/16 17:07:05 INFO DAGScheduler: Submitting 1 missing tasks from ResultStage 4 (CassandraTableScanRDD[17] at RDD at CassandraRDD.scala:18)
16/08/16 17:07:05 INFO TaskSchedulerImpl: Adding task set 4.0 with 1 tasks
16/08/16 17:07:05 INFO TaskSetManager: Starting task 0.0 in stage 4.0 (TID 204, localhost, partition 0,NODE_LOCAL, 22553 bytes)
16/08/16 17:07:05 INFO Executor: Running task 0.0 in stage 4.0 (TID 204)
16/08/16 17:07:06 INFO Executor: Finished task 0.0 in stage 4.0 (TID 204). 2074 bytes result sent to driver
16/08/16 17:07:06 INFO TaskSetManager: Finished task 0.0 in stage 4.0 (TID 204) in 1267 ms on localhost (1/1)
16/08/16 17:07:06 INFO DAGScheduler: ResultStage 4 (take at CassandraRDD.scala:121) finished in 1.276 s
16/08/16 17:07:06 INFO TaskSchedulerImpl: Removed TaskSet 4.0, whose tasks have all completed, from pool
16/08/16 17:07:06 INFO DAGScheduler: Job 3 finished: take at CassandraRDD.scala:121, took 1.310929 s
16/08/16 17:07:06 INFO SparkContext: Starting job: take at CassandraRDD.scala:121
16/08/16 17:07:06 INFO DAGScheduler: Got job 4 (take at CassandraRDD.scala:121) with 4 output partitions
16/08/16 17:07:06 INFO DAGScheduler: Final stage: ResultStage 5 (take at CassandraRDD.scala:121)
16/08/16 17:07:06 INFO DAGScheduler: Parents of final stage: List()
16/08/16 17:07:06 INFO DAGScheduler: Missing parents: List()
16/08/16 17:07:06 INFO DAGScheduler: Submitting ResultStage 5 (CassandraTableScanRDD[17] at RDD at CassandraRDD.scala:18), which has no missing parents
16/08/16 17:07:06 INFO MemoryStore: Block broadcast_8 stored as values in memory (estimated size 8.4 KB, free 183.1 KB)
16/08/16 17:07:06 INFO MemoryStore: Block broadcast_8_piece0 stored as byt es in memory (estimated size 4.2 KB, free 187.3 KB)
16/08/16 17:07:06 INFO BlockManagerInfo: Added broadcast_8_piece0 in memory on localhost:43680 (size: 4.2 KB, free: 756.3 MB)
16/08/16 17:07:06 INFO SparkContext: Created broadcast 8 from broadcast at DAGScheduler.scala:1006
16/08/16 17:07:06 INFO DAGScheduler: Submitting 4 missing tasks from ResultStage 5 (CassandraTableScanRDD[17] at RDD at CassandraRDD.scala:18)
16/08/16 17:07:06 INFO TaskSchedulerImpl: Adding task set 5.0 with 4 tasks
16/08/16 17:07:06 INFO TaskSetManager: Starting task 0.0 in stage 5.0 (TID 205, localhost, partition 1,NODE_LOCAL, 22553 bytes)
16/08/16 17:07:06 INFO Executor: Running task 0.0 in stage 5.0 (TID 205)
16/08/16 17:07:07 INFO Executor: Finished task 0.0 in stage 5.0 (TID 205). 2074 bytes result sent to driver
16/08/16 17:07:07 INFO TaskSetManager: Finished task 0.0 in stage 5.0 (TID 205) in 706 ms on localhost (1/4)
16/08/16 17:07:14 INFO CassandraConnector: Disconnected from Cassandra cluster: Test Cluster
16/08/16 17:32:40 INFO BlockManagerInfo: Removed broadcast_7_piece0 on localhost:43680 in memory (size: 4.2 KB, free: 756.4 MB)
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 14
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 13
16/08/16 17:32:40 INFO BlockManagerInfo: Removed broadcast_5_piece0 on localhost:43680 in memory (size: 7.1 KB, free: 756.4 MB)
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 12
16/08/16 17:32:40 INFO ContextCleaner: Cleaned shuffle 0
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 11
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 10
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 9
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 8
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 7
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 6
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 5
16/08/16 17:32:40 INFO ContextCleaner: Cleaned accumulator 4
16/08/16 17:32:40 INFO BlockManagerInfo: Removed broadcast_4_piece0 on localhost:43680 in memory (size: 13.8 KB, free: 756.4 MB)
16/08/16 20:45:06 INFO SparkContext: Invoking stop() from shutdown hook
EDIT
This is snippet of code what am I doing exactly:
import org.apache.spark.sql.SQLContext
import org.apache.spark.{SparkConf, SparkContext}
import org.apache.spark
import org.apache.spark.storage.StorageLevel
import org.apache.spark.sql.types.{StructType, StructField, DateType, IntegerType};
object ff {
def main(string: Array[String]) {
val conf = new SparkConf()
.set("spark.cassandra.connection.host", "127.0.0.1")
.setMaster("local[4]")
.setAppName("ff")
val sc = new SparkContext(conf)
val sqlContext = new SQLContext(sc)
val df = sqlContext.read
.format("com.databricks.spark.csv")
.option("header", "true") // Use first line of all files as header
.option("inferSchema", "true")
.load("test.csv")
df.registerTempTable("ff_table")
//df.printSchema()
df.count
time {
df.write
.format("org.apache.spark.sql.cassandra")
.options(Map("table" -> "ff_table", "keyspace" -> "traffic"))
.save()
}
def time[A](f: => A) = {
val s = System.nanoTime
val ret = f
println("time: " + (System.nanoTime - s) / 1e6 + "ms")
ret
}
}
}
Also, if I run nodetool describecluster I got this results:
Cluster Information:
Name: Test Cluster
Snitch: org.apache.cassandra.locator.DynamicEndpointSnitch
Partitioner: org.apache.cassandra.dht.Murmur3Partitioner
Schema versions:
bf6c3ae7-5c8b-3e5d-9794-8e34bee9278f: [127.0.0.1, 127.0.0.2, 127.0.0.3, 127.0.0.4, 127.0.0.5, 127.0.0.6]
My keyspace configuration:
CREATE KEYSPACE traffic WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'} AND durable_writes = true;
I tried to insert in CLI on row for replication_factor:3 and it's working, so every node can see each other.
Why Spark can't insert anything than, anyone idea?
来源：https://stackoverflow.com/questions/38978886/cant-write-to-cluster-if-replication-factor-is-greater-than-1