CDH 5.14 Kudu 1.6 Spark 1.6.0 standalone and 2.2.0   I cannot properly connect to Kudu from Spark, error says "Kudu master has no leader" When I use Impala in HUE to create and query kudu tables, it works flawlessly. However, connecting from Spark throws some errors I cannot decipher. I have tried using both pyspark and spark-shell. With spark shell I had to use spark 1.6 instead of 2.2 because some maven dependencies problems, that I have localized but not been able to fix. More info here.     Case 1: using 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       Case 2: using spark-shell (Spark 1.6.0 standalone):   $ 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] It seems to be connecting, as it is able to show the column names, but if I // register a temporary table and use SQL df.registerTempTable("test") val filteredDF = sqlContext.sql("select count(*) from test").show() bang! [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   As I said, Kudu service is up an running, and I am able to query kudu tables from Hue using Impala. What am I missing here? Is this the right approach to interfacing Spark with Kudu?   Thanks   ... View more