我无法从 Spark 正确连接到 Kudu，错误提示“Kudu master 没有领导者”
- CDH 5.14
- 酷都 1.6
- Spark 1.6.0 独立版和 2.2.0
当我在 HUE 中使用 Impala 创建和查询 kudu 表时，它可以完美运行。
但是，从 Spark 连接会引发一些我无法解读的错误。
我尝试过同时使用 pyspark 和 spark-shell。使用 spark shell 我不得不使用 spark 1.6 而不是 2.2，因为一些 maven 依赖问题，我已经本地化但无法修复。更多信息在这里。
案例1：使用pyspark2（Spark 2.2.0）
$ pyspark2 --master yarn --jars /opt/cloudera/parcels/CDH-5.14.0-1.cdh5.14.0.p0.24/lib/kudu/kudu-spark2_2.11.jar
> df = sqlContext.read.format('org.apache.kudu.spark.kudu').options(**{"kudu.master":"172.17.0.43:7077", "kudu.table":"impala::default.test"}).load()
18/03/02 10:23:27 WARN client.ConnectToCluster: Error receiving response from 172.17.0.43:7077
org.apache.kudu.client.RecoverableException: [peer master-172.17.0.43:7077] encountered a read timeout; closing the channel
at org.apache.kudu.client.Connection.exceptionCaught(Connection.java:412)
at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
at org.apache.kudu.client.Connection.handleUpstream(Connection.java:239)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.exceptionCaught(SimpleChannelUpstreamHandler.java:153)
at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.apache.kudu.shaded.org.jboss.netty.channel.Channels.fireExceptionCaught(Channels.java:536)
at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.readTimedOut(ReadTimeoutHandler.java:236)
at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler$ReadTimeoutTask$1.run(ReadTimeoutHandler.java:276)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.ChannelRunnableWrapper.run(ChannelRunnableWrapper.java:40)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:391)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:315)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutException
at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.<clinit>(ReadTimeoutHandler.java:84)
at org.apache.kudu.client.Connection$ConnectionPipeline.init(Connection.java:782)
at org.apache.kudu.client.Connection.<init>(Connection.java:199)
at org.apache.kudu.client.ConnectionCache.getConnection(ConnectionCache.java:133)
at org.apache.kudu.client.AsyncKuduClient.newRpcProxy(AsyncKuduClient.java:248)
at org.apache.kudu.client.AsyncKuduClient.newMasterRpcProxy(AsyncKuduClient.java:272)
at org.apache.kudu.client.ConnectToCluster.run(ConnectToCluster.java:157)
at org.apache.kudu.client.AsyncKuduClient.getMasterTableLocationsPB(AsyncKuduClient.java:1350)
at org.apache.kudu.client.AsyncKuduClient.exportAuthenticationCredentials(AsyncKuduClient.java:651)
at org.apache.kudu.client.KuduClient.exportAuthenticationCredentials(KuduClient.java:293)
at org.apache.kudu.spark.kudu.KuduContext$$anon$1.run(KuduContext.scala:97)
at org.apache.kudu.spark.kudu.KuduContext$$anon$1.run(KuduContext.scala:96)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:360)
at org.apache.kudu.spark.kudu.KuduContext.<init>(KuduContext.scala:96)
at org.apache.kudu.spark.kudu.KuduRelation.<init>(DefaultSource.scala:162)
at org.apache.kudu.spark.kudu.DefaultSource.createRelation(DefaultSource.scala:75)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:306)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:178)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:280)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:214)
... 1 more
18/03/02 10:23:27 WARN client.ConnectToCluster: Unable to find the leader master 172.17.0.43:7077; will retry
Py4JJavaError Traceback (most recent call last)
<ipython-input-1-e1dfaec7a544> in <module>()
----> 1 df = sqlContext.read.format('org.apache.kudu.spark.kudu').options(**{"kudu.master":"172.17.0.43:7077", "kudu.table":"impala::default.logika_dataset_kudu"}).load()
/opt/cloudera/parcels/SPARK2-2.2.0.cloudera2-1.cdh5.12.0.p0.232957/lib/spark2/python/pyspark/sql/readwriter.py in load(self, path, format, schema, **options)
163 return self._df(self._jreader.load(self._spark._sc._jvm.PythonUtils.toSeq(path)))
164 else:
--> 165 return self._df(self._jreader.load())
166
167 @since(1.4)
/opt/cloudera/parcels/SPARK2-2.2.0.cloudera2-1.cdh5.12.0.p0.232957/lib/spark2/python/lib/py4j-0.10.4-src.zip/py4j/java_gateway.py in __call__(self, *args)
1131 answer = self.gateway_client.send_command(command)
1132 return_value = get_return_value(
-> 1133 answer, self.gateway_client, self.target_id, self.name)
1134
1135 for temp_arg in temp_args:
/opt/cloudera/parcels/SPARK2-2.2.0.cloudera2-1.cdh5.12.0.p0.232957/lib/spark2/python/pyspark/sql/utils.py in deco(*a, **kw)
61 def deco(*a, **kw):
62 try:
---> 63 return f(*a, **kw)
64 except py4j.protocol.Py4JJavaError as e:
65 s = e.java_exception.toString()
/opt/cloudera/parcels/SPARK2-2.2.0.cloudera2-1.cdh5.12.0.p0.232957/lib/spark2/python/lib/py4j-0.10.4-src.zip/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)
317 raise Py4JJavaError(
318 "An error occurred while calling {0}{1}{2}.\n".
--> 319 format(target_id, ".", name), value)
320 else:
321 raise Py4JError(
Py4JJavaError: An error occurred while calling o59.load.
: java.security.PrivilegedActionException: org.apache.kudu.client.NoLeaderFoundException: Master config (172.17.0.43:7077) has no leader. Exceptions received: org.apache.kudu.client.RecoverableException: [peer master-172.17.0.43:7077] encountered a read timeout; closing the channel
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:360)
at org.apache.kudu.spark.kudu.KuduContext.<init>(KuduContext.scala:96)
at org.apache.kudu.spark.kudu.KuduRelation.<init>(DefaultSource.scala:162)
at org.apache.kudu.spark.kudu.DefaultSource.createRelation(DefaultSource.scala:75)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:306)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:178)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:280)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:214)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.kudu.client.NoLeaderFoundException: Master config (172.17.0.43:7077) has no leader. Exceptions received: org.apache.kudu.client.RecoverableException: [peer master-172.17.0.43:7077] encountered a read timeout; closing the channel
at org.apache.kudu.client.ConnectToCluster.incrementCountAndCheckExhausted(ConnectToCluster.java:272)
at org.apache.kudu.client.ConnectToCluster.access$100(ConnectToCluster.java:49)
at org.apache.kudu.client.ConnectToCluster$ConnectToMasterErrCB.call(ConnectToCluster.java:349)
at org.apache.kudu.client.ConnectToCluster$ConnectToMasterErrCB.call(ConnectToCluster.java:338)
at com.stumbleupon.async.Deferred.doCall(Deferred.java:1280)
at com.stumbleupon.async.Deferred.runCallbacks(Deferred.java:1259)
at com.stumbleupon.async.Deferred.handleContinuation(Deferred.java:1315)
at com.stumbleupon.async.Deferred.doCall(Deferred.java:1286)
at com.stumbleupon.async.Deferred.runCallbacks(Deferred.java:1259)
at com.stumbleupon.async.Deferred.callback(Deferred.java:1002)
at org.apache.kudu.client.KuduRpc.handleCallback(KuduRpc.java:238)
at org.apache.kudu.client.KuduRpc.errback(KuduRpc.java:292)
at org.apache.kudu.client.RpcProxy.failOrRetryRpc(RpcProxy.java:388)
at org.apache.kudu.client.RpcProxy.responseReceived(RpcProxy.java:217)
at org.apache.kudu.client.RpcProxy.access$000(RpcProxy.java:60)
at org.apache.kudu.client.RpcProxy$1.call(RpcProxy.java:132)
at org.apache.kudu.client.RpcProxy$1.call(RpcProxy.java:128)
at org.apache.kudu.client.Connection.cleanup(Connection.java:694)
at org.apache.kudu.client.Connection.exceptionCaught(Connection.java:439)
at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
at org.apache.kudu.client.Connection.handleUpstream(Connection.java:239)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.exceptionCaught(SimpleChannelUpstreamHandler.java:153)
at org.apache.kudu.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.apache.kudu.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.apache.kudu.shaded.org.jboss.netty.channel.Channels.fireExceptionCaught(Channels.java:536)
at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.readTimedOut(ReadTimeoutHandler.java:236)
at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler$ReadTimeoutTask$1.run(ReadTimeoutHandler.java:276)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.ChannelRunnableWrapper.run(ChannelRunnableWrapper.java:40)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:391)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:315)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
at org.apache.kudu.shaded.org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.apache.kudu.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.apache.kudu.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
... 1 more
Caused by: org.apache.kudu.client.RecoverableException: [peer master-172.17.0.43:7077] encountered a read timeout; closing the channel
at org.apache.kudu.client.Connection.exceptionCaught(Connection.java:412)
... 21 more
Caused by: org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutException
at org.apache.kudu.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.<clinit>(ReadTimeoutHandler.java:84)
at org.apache.kudu.client.Connection$ConnectionPipeline.init(Connection.java:782)
at org.apache.kudu.client.Connection.<init>(Connection.java:199)
at org.apache.kudu.client.ConnectionCache.getConnection(ConnectionCache.java:133)
at org.apache.kudu.client.AsyncKuduClient.newRpcProxy(AsyncKuduClient.java:248)
at org.apache.kudu.client.AsyncKuduClient.newMasterRpcProxy(AsyncKuduClient.java:272)
at org.apache.kudu.client.ConnectToCluster.run(ConnectToCluster.java:157)
at org.apache.kudu.client.AsyncKuduClient.getMasterTableLocationsPB(AsyncKuduClient.java:1350)
at org.apache.kudu.client.AsyncKuduClient.exportAuthenticationCredentials(AsyncKuduClient.java:651)
at org.apache.kudu.client.KuduClient.exportAuthenticationCredentials(KuduClient.java:293)
at org.apache.kudu.spark.kudu.KuduContext$$anon$1.run(KuduContext.scala:97)
at org.apache.kudu.spark.kudu.KuduContext$$anon$1.run(KuduContext.scala:96)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:360)
at org.apache.kudu.spark.kudu.KuduContext.<init>(KuduContext.scala:96)
at org.apache.kudu.spark.kudu.KuduRelation.<init>(DefaultSource.scala:162)
at org.apache.kudu.spark.kudu.DefaultSource.createRelation(DefaultSource.scala:75)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:306)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:178)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:280)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:214)
... 1 more
案例 2：使用 spark-shell（独立 Spark 1.6.0）：
$ spark-shell --master spark://localhost:7077 --packages org.apache.kudu:kudu-spark_2.10:1.1.0
> import org.apache.kudu.spark.kudu._
> import org.apache.kudu.client._
> import collection.JavaConverters._
> val df = sqlContext.read.options(Map("kudu.master" -> "localhost:7051","kudu.table" -> "impala::default.test")).kudu
df: org.apache.spark.sql.DataFrame = [dataset: string, id: string, itemnumber: string, srcid: string, timestamp: string, year: string, month: string, day: string, week: string, quarter: string, season: string, city: string, region1: string, region2: string, region3: string, region4: string, locality: string, itemname: string, itembqu: string, product_category: string, amount: string, mapped_zipcode: string, latitude: string, longitude: string, depositor_code: string, depositor_name: string, customer_code: string, is_island: string]
它似乎正在连接，因为它能够显示列名，但如果我
// register a temporary table and use SQL
df.registerTempTable("test")
val filteredDF = sqlContext.sql("select count(*) from test").show()
砰！
[Stage 0:> (0 + 6) / 6]
Lost task 1.0 in stage 0.0 (TID 1, tt-slave-2.novalocal, executor 1): org.apache.kudu.client.NonRecoverableException: RPC can not complete before timeout: KuduRpc(method=GetTableSchema, tablet=null, attempt=30, DeadlineTracker(timeout=30000, elapsed=27307), Traces:
[0ms] querying master,
[48ms] Sub rpc: GetMasterRegistration sending RPC to server Kudu Master - localhost:7051,
[71ms] Sub rpc: GetMasterRegistration received from server Kudu Master - localhost:7051 response
Network error:
[Peer Kudu Master - localhost:7051] Connection reset,
[75ms] delaying RPC due to Service unavailable: Master config (localhost:7051) has no leader.
Exceptions received: org.apache.kudu.client.RecoverableException:
[Peer Kudu Master - localhost:7051] Connection reset,
...
(SAME MESSAGE REPEATS 25 TIMES)
...
[24262ms] querying master,
[24262ms] Sub rpc: GetMasterRegistration sending RPC to server Kudu Master - localhost:7051,
[24263ms] Sub rpc: GetMasterRegistration received from server Kudu Master - localhost:7051 response
Network error:
[Peer Kudu Master - localhost:7051] Connection reset,
[24263ms] delaying RPC due to Service unavailable: Master config (localhost:7051) has no leader.
Exceptions received: org.apache.kudu.client.RecoverableException:
[Peer Kudu Master - localhost:7051] Connection reset,
[24661ms] trace too long, truncated)
at org.apache.kudu.client.AsyncKuduClient.tooManyAttemptsOrTimeout(AsyncKuduClient.java:961)
at org.apache.kudu.client.AsyncKuduClient.delayedSendRpcToTablet(AsyncKuduClient.java:1203)
at org.apache.kudu.client.AsyncKuduClient.access$800(AsyncKuduClient.java:110)
at org.apache.kudu.client.AsyncKuduClient$RetryRpcErrback.call(AsyncKuduClient.java:764)
at org.apache.kudu.client.AsyncKuduClient$RetryRpcErrback.call(AsyncKuduClient.java:754)
at com.stumbleupon.async.Deferred.doCall(Deferred.java:1278)
at com.stumbleupon.async.Deferred.runCallbacks(Deferred.java:1257)
at com.stumbleupon.async.Deferred.callback(Deferred.java:1005)
at org.apache.kudu.client.GetMasterRegistrationReceived.incrementCountAndCheckExhausted(GetMasterRegistrationReceived.java:156)
at org.apache.kudu.client.GetMasterRegistrationReceived.access$300(GetMasterRegistrationReceived.java:45)
at org.apache.kudu.client.GetMasterRegistrationReceived$GetMasterRegistrationErrCB.call(GetMasterRegistrationReceived.java:236)
at org.apache.kudu.client.GetMasterRegistrationReceived$GetMasterRegistrationErrCB.call(GetMasterRegistrationReceived.java:225)
at com.stumbleupon.async.Deferred.doCall(Deferred.java:1278)
at com.stumbleupon.async.Deferred.runCallbacks(Deferred.java:1257)
at com.stumbleupon.async.Deferred.callback(Deferred.java:1005)
at org.apache.kudu.client.KuduRpc.handleCallback(KuduRpc.java:220)
at org.apache.kudu.client.KuduRpc.errback(KuduRpc.java:274)
at org.apache.kudu.client.TabletClient.failOrRetryRpc(TabletClient.java:770)
at org.apache.kudu.client.TabletClient.failOrRetryRpcs(TabletClient.java:747)
at org.apache.kudu.client.TabletClient.cleanup(TabletClient.java:736)
at org.apache.kudu.client.TabletClient.channelClosed(TabletClient.java:698)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
at org.apache.kudu.client.TabletClient.handleUpstream(TabletClient.java:679)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.apache.kudu.client.shaded.org.jboss.netty.handler.timeout.ReadTimeoutHandler.channelClosed(ReadTimeoutHandler.java:176)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.Channels.fireChannelClosed(Channels.java:468)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.Channels$6.run(Channels.java:457)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.socket.ChannelRunnableWrapper.run(ChannelRunnableWrapper.java:40)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:391)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:315)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
at org.apache.kudu.client.shaded.org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.apache.kudu.client.shaded.org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.apache.kudu.client.shaded.org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.kudu.client.NoLeaderFoundException: Master config (localhost:7051) has no leader. Exceptions received: org.apache.kudu.client.RecoverableException: [Peer Kudu Master - localhost:7051] Connection reset
at org.apache.kudu.client.GetMasterRegistrationReceived.incrementCountAndCheckExhausted(GetMasterRegistrationReceived.java:154)
... 32 more
Caused by: org.apache.kudu.client.RecoverableException: [Peer Kudu Master - localhost:7051] Connection reset
at org.apache.kudu.client.TabletClient.cleanup(TabletClient.java:734)
... 21 more
正如我所说，Kudu 服务正在运行，我可以使用 Impala 从 Hue 查询 kudu 表。
我在这里想念什么？这是将 Spark 与 Kudu 连接的正确方法吗？
谢谢