In a non-Kerberized environment, for Kafka console consumer command displays all messages, perform the following: Note: Here, <broker_host> is Kafka broker hostname, <zk_host> is zookeeper hostname and Kafka port will be 6667: Using Old consumer API (prior to HDP 2.5.x), run the following: bin/kafka-console-consumer.sh --zookeeper <zk_host>:2181 --topic test --from-beginning Using New consumer API ( From HDP 2.5.x onwards), run the following: bin/kafka-console-consumer.sh --bootstrap-server <broker_host>:6667 --topic test --from-beginnin To view a specific number of message in a Kafka topic, use the --max-messages option. To view the oldest message, run the console consumer with --from-beginning and --max-messages 1: Using Old consumer API ( Prior to HDP 2.5.x): bin/kafka-console-consumer.sh --zookeeper <zk_host>:2181 --topic test --from-beginning --max-messages 1 Using New consumer API ( From HDP 2.5.x onwards): bin/kafka-console-consumer.sh --bootstrap-server <broker_host>:6667 --topic test --from-beginning --max-messages ... View more

Problem: While implementing Auto-Hdfs, following errors were thrown in Nimbus log: Caused by: org.apache.hadoop.security.authentication.client.AuthenticationException: Authentication failed, URL: https://da0gdal202.match.corp:9393/kms/v1/?op=GETDELEGATIONTOKEN&doAs=gdsreader&renewer=hdfs-hdpprod%40MATCH.CORP&user.name=hdfs, status: 403, message: Forbidden at org.apache.hadoop.security.authentication.client.AuthenticatedURL.extractToken(AuthenticatedURL.java:278) at org.apache.hadoop.security.authentication.client.PseudoAuthenticator.authenticate(PseudoAuthenticator.java:77) at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.authenticate(DelegationTokenAuthenticator.java:132) at org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:212) at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.authenticate(DelegationTokenAuthenticator.java:132) at org.apache.hadoop.security.authentication.client.AuthenticatedURL.openConnection(AuthenticatedURL.java:216) at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.doDelegationTokenOperation(DelegationTokenAuthenticator.java:298) at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.getDelegationToken(DelegationTokenAuthenticator.java:170) at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticatedURL.getDelegationToken(DelegationTokenAuthenticatedURL.java:371) at org.apache.hadoop.crypto.key.kms.KMSClientProvider$4.run(KMSClientProvider.java:1024) at org.apache.hadoop.crypto.key.kms.KMSClientProvider$4.run(KMSClientProvider.java:1019) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1724) Cause: 1. No symlink of Ranger KMS conf to core-site and hdfs-site 2. Missing 'kms.proxyuser.hdfs.groups' and 'hadoop.kms.proxyuser.hdfs.hosts' in Kms-site.xml Solution: 1. Created symlink of ranger kms conf to core site and hdfs site 2. Added following properties in Kms-site.xml: <property> <name>hadoop.kms.proxyuser.hdfs.groups</name> <value>*</value> </property> <property> <name>hadoop.kms.proxyuser.hdfs.hosts</name> <value>*</value> </property> ... View more

Problem: In HDP 2.3.4 and Ambari 2.4.2, Storm nimbus was not coming up: 2017-05-30 14:35:18.756 o.a.t.s.TThreadPoolServer [ERROR] Error occurred during processing of message. java.lang.RuntimeException: No nimbus leader participant host found, have you started your nimbus hosts?? Following is the error from Nimbus log: 2017-05-30 14:35:18.750 b.s.d.nimbus [WARN] principal: storm@EXAMPLE.COM is trying to impersonate principal: ambari-server@EXAMPLE.COM 2017-05-30 14:35:18.751 b.s.d.nimbus [WARN] impersonation attempt but nimbus.impersonation.authorizer has no authorizer configured. potential security risk, please see SECURITY.MD to learn how to configure impersonation authorizer. 2017-05-30 14:35:18.756 o.a.t.s.TThreadPoolServer [ERROR] Error occurred during processing of message. java.lang.RuntimeException: No nimbus leader participant host found, have you started your nimbus hosts? Cause: Property ''nimbus.impersonation.authorizer" was set to 'org.apache.storm.security.auth.authorizer.ImpersonationAuthorizer'. Prior to HDP 2.5, the storm package was backtype instead of org.apache. Solution: Modify the property as follows: nimbus.impersonation.authorizer=backtype.storm.security.auth.authorizer.ImpersonationAuthorizer ... View more

Problem Description: Unable to start storm nimbus from Ambari, throwing following error: raise ExecutionFailed(err_msg, code, out, err) resource_management.core.exceptions.ExecutionFailed: Execution of 'ambari-sudo.sh ln -s /usr/lib/storm/lib/ambari-metrics-storm-sink-legacy-with-common-*.jar /usr/hdp/current/storm-nimbus/lib/ambari-metrics-storm-sink.jar' returned 1. ln: target `/usr/hdp/current/storm-nimbus/lib/ambari-metrics-storm-sink.jar' is not a directory Cause: Two legacy jars under storm lib: # ls -ld /usr/lib/storm/lib/ambari-metrics-storm-sink-legacy-with-common* -rw-r--r-- 1 root root 1937430 May 11 15:57 /usr/lib/storm/lib/ambari-metrics-storm-sink-legacy-with-common-2.4.1.0.22.jar -rw-r--r-- 1 root root 1933392 Nov 23 2016 /usr/lib/storm/lib/ambari-metrics-storm-sink-legacy-with-common-2.4.2.0.136.jar Solution: As the Ambari version was 2.4.2 so, moved ambari-metrics-storm-sink-legacy-with-common-2.4.1.0.22.jar to a different location and started storm nimbus. ... View more

Following was the error in supervisor log: 2017-06-09 14:40:18.348 o.a.s.d.supervisor [ERROR] Error on initialization of server mk-supervisor java.lang.RuntimeException: java.lang.ClassNotFoundException: backtype.storm.generated.LSSupervisorId at org.apache.storm.utils.LocalState.deserialize(LocalState.java:83) at org.apache.storm.utils.LocalState.get(LocalState.java:130) at org.apache.storm.local_state$ls_supervisor_id.invoke(local_state.clj:61) at org.apache.storm.daemon.supervisor$standalone_supervisor$reify__7977.prepare(supervisor.clj:1216) at org.apache.storm.daemon.supervisor$fn__7833$exec_fn__3537__auto____7834.invoke(supervisor.clj:766) at clojure.lang.AFn.applyToHelper(AFn.java:160) at clojure.lang.AFn.applyTo(AFn.java:144) at clojure.core$apply.invoke(core.clj:630) at org.apache.storm.daemon.supervisor$fn__7833$mk_supervisor__7878.doInvoke(supervisor.clj:764) at clojure.lang.RestFn.invoke(RestFn.java:436) at org.apache.storm.daemon.supervisor$_launch.invoke(supervisor.clj:1204) at org.apache.storm.daemon.supervisor$_main.invoke(supervisor.clj:1237) at clojure.lang.AFn.applyToHelper(AFn.java:152) at clojure.lang.AFn.applyTo(AFn.java:144) at org.apache.storm.daemon.supervisor.main(Unknown Source) Caused by: java.lang.ClassNotFoundException: backtype.storm.generated.LSSupervisorId at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at org.apache.storm.utils.LocalState.deserialize(LocalState.java:78) ... 14 more 2017-06-09 14:40:18.351 o.a.s.util [ERROR] Halting process: ("Error on initialization") java.lang.RuntimeException: ("Error on initialization") at org.apache.storm.util$exit_process_BANG_.doInvoke(util.clj:341) at clojure.lang.RestFn.invoke(RestFn.java:423) at org.apache.storm.daemon.supervisor$fn__7833$mk_supervisor__7878.doInvoke(supervisor.clj:764) at clojure.lang.RestFn.invoke(RestFn.java:436) at org.apache.storm.daemon.supervisor$_launch.invoke(supervisor.clj:1204) at org.apache.storm.daemon.supervisor$_main.invoke(supervisor.clj:1237) at clojure.lang.AFn.applyToHelper(AFn.java:152) at clojure.lang.AFn.applyTo(AFn.java:144) at org.apache.storm.daemon.supervisor.main(Unknown Source) Cause: 1. Few storm configs were still configured with backtype packages 2. Stale states in zookeeper and local data Solution: 1. Filtered in the configs and changed all the backtype packages to org.apache as Storm from HDP 2.5 onwards uses org.apache packages. 2. Follow below steps to clear stale states and local data: -> Deactivate all running topologies. -> Stop Storm service -> Delete all states under zookeeper: $/usr/hdp/current/zookeeper-client/bin/zkCli.sh (optionally in secure environment specify -server zk.server:port) > rmr /storm -> Delete all states under the storm-local directory. Please make sure to run this on all storm hosts: $ rm -rf <value of stormlocal.dir> -> Start storm service. ... View more

Problem Description: On deleting few kafka topics and creating same topics again there Not Leader for this partition exception while Producing/Consuming and was reading old meta data. Getting Below error: 17/03/10 10:45:35 ERROR ApplicationMaster: User class threw exception: org.apache.spark.SparkException: org.apache.spark.SparkException: Couldn't find leaders for Set([akrnohij-wng-fp9,47], [akrnohij-wng-fp4,224], [akrnohij-wng-fp11,172], [akrnohij-wng-fp1,84], [akrnohij-wng-fp10,117], [akrnohij-wng-fp10,168], [akrnohij-wng-fp4,176], [akrnohij-wng-fp1,136], [akrnohij-wng-fp9,167], [akrnohij-wng-fp2,174], [akrnohij-wng-fp11,74], [akrnohij-wng-fp3,189], [akrnohij-wng-fp11,200], [akrnohij-wng-fp11,168], [akrnohij-wng-fp4,149], [akrnohij-wng-fp7,127], [akrnohij-wng-fp6,39], [akrnohij-wng-fp10,133], [akrnohij-wng-fp9,171], [akrnohij-wng-fp5,175], [akrnohij-wng-fp7,181] Cause: The zookeeper ACL for state znode was not correct : getAcl /brokers/topics/akrnohij-wng-fp4/partitions/135/state ‘auth,’ : cdrwa, ‘world,’anyone :r The following property was set in zookeeper env : -Dzookeeper.skipACL=yes Solution: Deleted the topic manually as deletion was stuck Removed the property -Dzookeeper.skipACL=yes Restart zookeeper and Kafka services NOTE- It is dangerous to use -Dzookeeper.skipACL=yes property and instead it is recommended to use kafka service principal if in case you need to delete the znode for kafka topics. ... View more

PROBLEM: While implementing AutoHDFS for storm-hdfs integration, observed following error: 2017-05-19 11:21:44.865 o.a.s.h.c.s.AutoHDFS [ERROR] Could not populate HDFS credentials. java.lang.RuntimeException: Failed to get delegation tokens. at org.apache.storm.hdfs.common.security.AutoHDFS.getHadoopCredentials(AutoHDFS.java:242) at org.apache.storm.hdfs.common.security.AutoHDFS.populateCredentials(AutoHDFS.java:76) 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 clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93) at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28) at org.apache.storm.daemon.nimbus$mk_reified_nimbus$reify__11226.submitTopologyWithOpts(nimbus.clj:1544) at org.apache.storm.generated.Nimbus$Processor$submitTopologyWithOpts.getResult(Nimbus.java:2940) at org.apache.storm.generated.Nimbus$Processor$submitTopologyWithOpts.getResult(Nimbus.java:2924) at org.apache.storm.thrift.ProcessFunction.process(ProcessFunction.java:39) at org.apache.storm.thrift.TBaseProcessor.process(TBaseProcessor.java:39) at org.apache.storm.security.auth.SaslTransportPlugin$TUGIWrapProcessor.process(SaslTransportPlugin.java:138) at org.apache.storm.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.hadoop.hdfs.DistributedFileSystem not found at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2214) at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2746) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2759) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:99) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2795) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2777) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:386) at org.apache.storm.hdfs.common.security.AutoHDFS$1.run(AutoHDFS.java:217) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:360) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1704) at org.apache.storm.hdfs.common.security.AutoHDFS.getHadoopCredentials(AutoHDFS.java:213) ... 17 more Caused by: java.lang.ClassNotFoundException: Class org.apache.hadoop.hdfs.DistributedFileSystem not found at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2120) CAUSE: Missing Hadoop dependencies in pom.xml caused the following exception: Caused by: java.lang.ClassNotFoundException: Class org.apache.hadoop.hdfs.DistributedFileSystem not found SOLUTION: To resolve this issue, added the following dependency in pom.xml: <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-hdfs</artifactId> <version>2.7.3.2.5.3.0-37</version> <exclusions> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>2.7.3.2.5.3.0-37</version> <exclusions> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> </exclusions> </dependency> ... View more