bq. org.freinds_rep.java.Insert_friend.search_column(Insert_friend.java:106)
Does line 106 correspond to result.containsColumn() call ? If so, result was null. On Wed, Nov 19, 2014 at 9:47 AM, beeshma r <[email protected]> wrote: > Hi > > i need to find whether particular column qualifier present in column family > so i did code like this > > As per document > > public boolean containsColumn(byte[] family, > byte[] qualifier) > > Checks for existence of a value for the specified column (empty or not). > Parameters:family - family namequalifier - column qualifierReturns:true if > at least one value exists in the result, false if not > > ////////////////////////// //my code//////////// > > public static boolean search_column(String mail) throws IOException > { > > HTable testTable = new HTable(frinds_util.get_config(), > "people");//configuration > byte[] email_b=Bytes.toBytes(mail);//column qulifier > byte[] colmnfamily=Bytes.toBytes("colmn_fam");//column family > Scan scan_col=new Scan (Bytes.toBytes("colmn_fam"),email_b); > ResultScanner results = testTable.getScanner(scan_col); > Result result = results.next(); > > if(result.containsColumn(colmnfamily, email_b))//check whether > column presernt > > { > System.out.println("column is present"); > ret=true; > > } > return ret; > > } > > my build is failed with below o/p > > > > java.lang.reflect.InvocationTargetException > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293) > at java.lang.Thread.run(Thread.java:724) > Caused by: java.lang.NullPointerException > at > org.freinds_rep.java.Insert_friend.search_column(Insert_friend.java:106) > at org.freinds_rep.java.Insert_friend.main(Insert_friend.java:156) > ... 6 more > [WARNING] thread Thread[org.freinds_rep.java.Insert_friend.main( > 127.0.0.1:2181),5,org.freinds_rep.java.Insert_friend] was interrupted but > is still alive after waiting at least 15000msecs > [WARNING] thread Thread[org.freinds_rep.java.Insert_friend.main( > 127.0.0.1:2181),5,org.freinds_rep.java.Insert_friend] will linger despite > being asked to die via interruption > [WARNING] NOTE: 1 thread(s) did not finish despite being asked to via > interruption. This is not a problem with exec:java, it is a problem with > the running code. Although not serious, it should be remedied. > [WARNING] Couldn't destroy threadgroup > > org.codehaus.mojo.exec.ExecJavaMojo$IsolatedThreadGroup[name=org.freinds_rep.java.Insert_friend,maxpri=10] > java.lang.IllegalThreadStateException > at java.lang.ThreadGroup.destroy(ThreadGroup.java:775) > at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:328) > at > > org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101) > at > > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209) > at > > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) > at > > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) > at > > org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84) > at > > org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59) > at > > org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183) > at > > org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161) > at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320) > at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156) > at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537) > at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196) > at org.apache.maven.cli.MavenCli.main(MavenCli.java:141) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > > org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) > at > org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) > at > > org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) > at > org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) > [INFO] > ------------------------------------------------------------------------ > [INFO] BUILD FAILURE > [INFO] > ------------------------------------------------------------------------ > [INFO] Total time: 1:23.294s > [INFO] Finished at: Wed Nov 19 09:08:48 PST 2014 > [INFO] Final Memory: 10M/137M > > > > > > Any idea how to solve this? >
