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?
