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Java HotSpot(TM) Client VM warning: You have loaded library /home/happyhadoop/hadoop-2.7.3/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. It's highly recommended that you fix the library with 'execstack -c ', or link it with '-z noexecstack'. 17/04/30 21:30:01 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Starting namenodes on [localhost] happyhadoop@localhost's password: localhost: namenode running as process 13997. Stop it first. happyhadoop@localhost's password: localhost: datanode running as process 14153. Stop it first. Starting secondary namenodes [0.0.0.0] happyhadoop@0.0.0.0's password: 0.0.0.0: secondarynamenode running as process 14432. Stop it first. Java HotSpot(TM) Client VM warning: You have loaded library /home/happyhadoop/hadoop-2.7.3/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now. It's highly recommended that you fix the library with 'execstack -c ', or link it with '-z noexecstack'. 17/04/30 21:30:36 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Can someone please help me with this warning?

JoshDM
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Sudheer Thota
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  • What were you trying to do, please provide more information about the intended action so you can receive the appropriate help. – Ekaba Bisong May 01 '17 at 04:55
  • I'm currently configuring hadoop on a server running Ubuntu 14.04LTS OS, When I run start-dfs.sh or stop-dfs.sh, I get the following error which i shared above comment – Sudheer Thota May 01 '17 at 05:00
  • Configuring Hadoop is a very tricky process. I suggest you follow carefully through [Hadoop: Setting up a Single Node Cluster](https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/SingleCluster.html). The simplest way however will be to download [Cloudera CDH](https://www.cloudera.com/downloads/cdh/5-11-0.html), which comes with Hadoop core and other parts of the Hadoop ecosystem like Hive, Pig, Impala and Sqoop installed. – Ekaba Bisong May 01 '17 at 05:09
  • StackGuard is an extension run automatically by the compiler to prevent buffer overflow. Curious why the Hadoop library is disabling it. Try running the commands suggested, i.e. `execstack -c` to fix the library. More info on that command can be seen here. [Package: execstack](http://packages.ubuntu.com/yakkety/execstack) – Ekaba Bisong May 01 '17 at 05:15
  • @Ekaba, okie..Let me cross verify once all the setting – Sudheer Thota May 01 '17 at 06:01
  • @EkabaBisong, configuration done properly only..after executing this command hadoop liberary is disabling. it is coming out of the process and throwing this error : WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable – Sudheer Thota May 01 '17 at 06:08
  • The following thread might prove useful, please check it. [Hadoop “Unable to load native-hadoop library for your platform” warning](http://stackoverflow.com/questions/19943766/hadoop-unable-to-load-native-hadoop-library-for-your-platform-warning?rq=1) – Ekaba Bisong May 01 '17 at 06:48

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