Any idea why this doesn't work (see code and stack trace below)?  I am
using accumulo trunk.  This problem only occurs when I use a Scanner
or BatchScanner.  If I comment out the scanning section there are no
errors.

Thanks,

--Jason

Java code (https://gist.github.com/1927202)

package accumulo;

import java.util.Map.Entry;

import org.apache.accumulo.core.client.BatchWriter;
import org.apache.accumulo.core.client.Connector;
import org.apache.accumulo.core.client.Instance;
import org.apache.accumulo.core.client.Scanner;
import org.apache.accumulo.core.client.mock.MockInstance;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Mutation;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.security.Authorizations;

public class Mock {

public static void main(String[] args) throws Exception {
String table = "data";
String user = "root";
Instance inst = new MockInstance("inst");
Connector conn = inst.getConnector(user, "secret");
conn.securityOperations().changeUserAuthorizations(user, new
Authorizations("auth"));
Authorizations auths = conn.securityOperations().getUserAuthorizations(user);
conn.tableOperations().create(table);

System.out.println("Ingesting data ...");
BatchWriter wr = conn.createBatchWriter(table, 10000000, 10000, 5);
for(int i = 0; i < 1000; ++i)
{
Mutation m = new Mutation("row_"+i);
m.put("cf_"+i, "cq_"+1, "val_"+1);
wr.addMutation(m);
}
wr.close();

System.out.println("Reading data ...");
Scanner s = conn.createScanner(table, auths);
for(Entry<Key, Value> e : s)
{
System.out.println(e);
}
System.out.println("Done");
}
}

stack trace (https://gist.github.com/1927225)

Ingesting data ...
Reading data ...
Exception in thread
"org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor"
java.lang.NullPointerException
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkEntries(FilesystemAlterationObserverImpl.java:317)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkAndNotify(FilesystemAlterationObserverImpl.java:331)
at org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor.run(AccumuloFilesystemAlterationMonitor.java:121)
at java.lang.Thread.run(Thread.java:722)

I'm not near a computer so I cannot verify, but it looks like you are
missing libraries? Make sure you build the project once so maven pulls in
the dependencies.

John

Sent from my phone, so pardon the typos and brevity.
On Feb 27, 2012 5:20 PM, "Jason Trost" <[EMAIL PROTECTED]> wrote:

> Any idea why this doesn't work (see code and stack trace below)?  I am
> using accumulo trunk.  This problem only occurs when I use a Scanner
> or BatchScanner.  If I comment out the scanning section there are no
> errors.
>
> Thanks,
>
> --Jason
>
> Java code (https://gist.github.com/1927202)
>
> package accumulo;
>
> import java.util.Map.Entry;
>
> import org.apache.accumulo.core.client.BatchWriter;
> import org.apache.accumulo.core.client.Connector;
> import org.apache.accumulo.core.client.Instance;
> import org.apache.accumulo.core.client.Scanner;
> import org.apache.accumulo.core.client.mock.MockInstance;
> import org.apache.accumulo.core.data.Key;
> import org.apache.accumulo.core.data.Mutation;
> import org.apache.accumulo.core.data.Value;
> import org.apache.accumulo.core.security.Authorizations;
>
> public class Mock {
>
>        public static void main(String[] args) throws Exception {
>                String table = "data";
>                String user = "root";
>                Instance inst = new MockInstance("inst");
>                Connector conn = inst.getConnector(user, "secret");
>                conn.securityOperations().changeUserAuthorizations(user, new
> Authorizations("auth"));
>                Authorizations auths > conn.securityOperations().getUserAuthorizations(user);
>                conn.tableOperations().create(table);
>
>                System.out.println("Ingesting data ...");
>                BatchWriter wr = conn.createBatchWriter(table, 10000000,
> 10000, 5);
>                for(int i = 0; i < 1000; ++i)
>                {
>                        Mutation m = new Mutation("row_"+i);
>                        m.put("cf_"+i, "cq_"+1, "val_"+1);
>                        wr.addMutation(m);
>                }
>                wr.close();
>
>                System.out.println("Reading data ...");
>                Scanner s = conn.createScanner(table, auths);
>                for(Entry<Key, Value> e : s)
>                {
>                        System.out.println(e);
>                }
>                System.out.println("Done");
>        }
> }
>
> stack trace (https://gist.github.com/1927225)
>
> Ingesting data ...
> Reading data ...
> Exception in thread
> "org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor"
> java.lang.NullPointerException
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkEntries(FilesystemAlterationObserverImpl.java:317)

I just dropped this file into to my accumulo1.4/src/core maven module and
ran it in eclipse and from the command line. No errors.

$ ./bin/accumulo accumulo.Mock
Ingesting data ...
Reading data ...
row_0 cf_0:cq_1 [] 1330435169481 false val_1
...
row_999 cf_999:cq_1 [] 1330435169614 false val_1
Done
-Eric

On Mon, Feb 27, 2012 at 5:19 PM, Jason Trost <[EMAIL PROTECTED]> wrote:

> Any idea why this doesn't work (see code and stack trace below)?  I am
> using accumulo trunk.  This problem only occurs when I use a Scanner
> or BatchScanner.  If I comment out the scanning section there are no
> errors.
>
> Thanks,
>
> --Jason
>
> Java code (https://gist.github.com/1927202)
>
> package accumulo;
>
> import java.util.Map.Entry;
>
> import org.apache.accumulo.core.client.BatchWriter;
> import org.apache.accumulo.core.client.Connector;
> import org.apache.accumulo.core.client.Instance;
> import org.apache.accumulo.core.client.Scanner;
> import org.apache.accumulo.core.client.mock.MockInstance;
> import org.apache.accumulo.core.data.Key;
> import org.apache.accumulo.core.data.Mutation;
> import org.apache.accumulo.core.data.Value;
> import org.apache.accumulo.core.security.Authorizations;
>
> public class Mock {
>
>        public static void main(String[] args) throws Exception {
>                String table = "data";
>                String user = "root";
>                Instance inst = new MockInstance("inst");
>                Connector conn = inst.getConnector(user, "secret");
>                conn.securityOperations().changeUserAuthorizations(user, new
> Authorizations("auth"));
>                Authorizations auths > conn.securityOperations().getUserAuthorizations(user);
>                conn.tableOperations().create(table);
>
>                System.out.println("Ingesting data ...");
>                BatchWriter wr = conn.createBatchWriter(table, 10000000,
> 10000, 5);
>                for(int i = 0; i < 1000; ++i)
>                {
>                        Mutation m = new Mutation("row_"+i);
>                        m.put("cf_"+i, "cq_"+1, "val_"+1);
>                        wr.addMutation(m);
>                }
>                wr.close();
>
>                System.out.println("Reading data ...");
>                Scanner s = conn.createScanner(table, auths);
>                for(Entry<Key, Value> e : s)
>                {
>                        System.out.println(e);
>                }
>                System.out.println("Done");
>        }
> }
>
> stack trace (https://gist.github.com/1927225)
>
> Ingesting data ...
> Reading data ...
> Exception in thread
> "org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor"
> java.lang.NullPointerException
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at
> org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)

When you try to scan it calls IteratorUtil.loadIterators() which calls
AccumuloClassLoader.loadClass().  The AccumuloClassLoader expects
ACCUMULO_HOME env var to be set, if it is not it does some vodo to try
to figure things out.  This could be failing.  Are you setting
ACCUMULO_HOME ?

On Mon, Feb 27, 2012 at 5:19 PM, Jason Trost <[EMAIL PROTECTED]> wrote:
> Any idea why this doesn't work (see code and stack trace below)?  I am
> using accumulo trunk.  This problem only occurs when I use a Scanner
> or BatchScanner.  If I comment out the scanning section there are no
> errors.
>
> Thanks,
>
> --Jason
>
> Java code (https://gist.github.com/1927202)
>
> package accumulo;
>
> import java.util.Map.Entry;
>
> import org.apache.accumulo.core.client.BatchWriter;
> import org.apache.accumulo.core.client.Connector;
> import org.apache.accumulo.core.client.Instance;
> import org.apache.accumulo.core.client.Scanner;
> import org.apache.accumulo.core.client.mock.MockInstance;
> import org.apache.accumulo.core.data.Key;
> import org.apache.accumulo.core.data.Mutation;
> import org.apache.accumulo.core.data.Value;
> import org.apache.accumulo.core.security.Authorizations;
>
> public class Mock {
>
>        public static void main(String[] args) throws Exception {
>                String table = "data";
>                String user = "root";
>                Instance inst = new MockInstance("inst");
>                Connector conn = inst.getConnector(user, "secret");
>                conn.securityOperations().changeUserAuthorizations(user, new
> Authorizations("auth"));
>                Authorizations auths = conn.securityOperations().getUserAuthorizations(user);
>                conn.tableOperations().create(table);
>
>                System.out.println("Ingesting data ...");
>                BatchWriter wr = conn.createBatchWriter(table, 10000000, 10000, 5);
>                for(int i = 0; i < 1000; ++i)
>                {
>                        Mutation m = new Mutation("row_"+i);
>                        m.put("cf_"+i, "cq_"+1, "val_"+1);
>                        wr.addMutation(m);
>                }
>                wr.close();
>
>                System.out.println("Reading data ...");
>                Scanner s = conn.createScanner(table, auths);
>                for(Entry<Key, Value> e : s)
>                {
>                        System.out.println(e);
>                }
>                System.out.println("Done");
>        }
> }
>
> stack trace (https://gist.github.com/1927225)
>
> Ingesting data ...
> Reading data ...
> Exception in thread
> "org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor"
> java.lang.NullPointerException
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkEntries(FilesystemAlterationObserverImpl.java:317)

Setting ACCUMULO_HOME in the run configuration for eclipse seemed to
help.  I still get the stack track, but the program ran.

Any other ideas?

Ingesting data ...
Reading data ...
Exception in thread
"org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor"
java.lang.NullPointerException
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkEntries(FilesystemAlterationObserverImpl.java:317)
at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkAndNotify(FilesystemAlterationObserverImpl.java:331)
at org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor.run(AccumuloFilesystemAlterationMonitor.java:121)
at java.lang.Thread.run(Thread.java:722)
row_0 cf_0:cq_1 [] 1330555426405 false val_1
row_1 cf_1:cq_1 [] 1330555426408 false val_1
row_10 cf_10:cq_1 [] 1330555426408 false val_1
row_100 cf_100:cq_1 [] 1330555426413 false val_1
row_101 cf_101:cq_1 [] 1330555426413 false val_1
row_102 cf_102:cq_1 [] 1330555426413 false val_1
row_103 cf_103:cq_1 [] 1330555426413 false val_1
row_104 cf_104:cq_1 [] 1330555426413 false val_1
row_105 cf_105:cq_1 [] 1330555426413 false val_1
row_106 cf_106:cq_1 [] 1330555426413 false val_1
row_107 cf_107:cq_1 [] 1330555426413 false val_1
row_108 cf_108:cq_1 [] 1330555426413 false val_1
row_109 cf_109:cq_1 [] 1330555426413 false val_1
...

On Wed, Feb 29, 2012 at 4:30 PM, Keith Turner <[EMAIL PROTECTED]> wrote:
> When you try to scan it calls IteratorUtil.loadIterators() which calls
> AccumuloClassLoader.loadClass().  The AccumuloClassLoader expects
> ACCUMULO_HOME env var to be set, if it is not it does some vodo to try
> to figure things out.  This could be failing.  Are you setting
> ACCUMULO_HOME ?
>
> On Mon, Feb 27, 2012 at 5:19 PM, Jason Trost <[EMAIL PROTECTED]> wrote:
>> Any idea why this doesn't work (see code and stack trace below)?  I am
>> using accumulo trunk.  This problem only occurs when I use a Scanner
>> or BatchScanner.  If I comment out the scanning section there are no
>> errors.
>>
>> Thanks,
>>
>> --Jason
>>
>> Java code (https://gist.github.com/1927202)
>>
>> package accumulo;
>>
>> import java.util.Map.Entry;
>>
>> import org.apache.accumulo.core.client.BatchWriter;
>> import org.apache.accumulo.core.client.Connector;
>> import org.apache.accumulo.core.client.Instance;
>> import org.apache.accumulo.core.client.Scanner;
>> import org.apache.accumulo.core.client.mock.MockInstance;
>> import org.apache.accumulo.core.data.Key;
>> import org.apache.accumulo.core.data.Mutation;
>> import org.apache.accumulo.core.data.Value;
>> import org.apache.accumulo.core.security.Authorizations;
>>
>> public class Mock {
>>
>>        public static void main(String[] args) throws Exception {
>>                String table = "data";
>>                String user = "root";
>>                Instance inst = new MockInstance("inst");
>>                Connector conn = inst.getConnector(user, "secret");
>>                conn.securityOperations().changeUserAuthorizations(user, new
>> Authorizations("auth"));
>>                Authorizations auths = conn.securityOperations().getUserAuthorizations(user);
>>                conn.tableOperations().create(table);
>>
>>                System.out.println("Ingesting data ...");
>>                BatchWriter wr = conn.createBatchWriter(table, 10000000, 10000, 5);

Taking a guess.  Do you have jars in your lib dir?  Wonder if the
absence of them is causing problems.

On Wed, Feb 29, 2012 at 5:45 PM, Jason Trost <[EMAIL PROTECTED]> wrote:
> Setting ACCUMULO_HOME in the run configuration for eclipse seemed to
> help.  I still get the stack track, but the program ran.
>
> Any other ideas?
>
> Ingesting data ...
> Reading data ...
> Exception in thread
> "org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor"
> java.lang.NullPointerException
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$MonitorFileImpl.listFiles(FilesystemAlterationObserverImpl.java:64)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:119)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.compareChilds(FilesystemAlterationObserverImpl.java:137)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl$Entry.needsToBeDeleted(FilesystemAlterationObserverImpl.java:203)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkEntries(FilesystemAlterationObserverImpl.java:317)
>        at org.apache.commons.jci.monitor.FilesystemAlterationObserverImpl.checkAndNotify(FilesystemAlterationObserverImpl.java:331)
>        at org.apache.accumulo.start.classloader.AccumuloFilesystemAlterationMonitor.run(AccumuloFilesystemAlterationMonitor.java:121)
>        at java.lang.Thread.run(Thread.java:722)
> row_0 cf_0:cq_1 [] 1330555426405 false val_1
> row_1 cf_1:cq_1 [] 1330555426408 false val_1
> row_10 cf_10:cq_1 [] 1330555426408 false val_1
> row_100 cf_100:cq_1 [] 1330555426413 false val_1
> row_101 cf_101:cq_1 [] 1330555426413 false val_1
> row_102 cf_102:cq_1 [] 1330555426413 false val_1
> row_103 cf_103:cq_1 [] 1330555426413 false val_1
> row_104 cf_104:cq_1 [] 1330555426413 false val_1
> row_105 cf_105:cq_1 [] 1330555426413 false val_1
> row_106 cf_106:cq_1 [] 1330555426413 false val_1
> row_107 cf_107:cq_1 [] 1330555426413 false val_1
> row_108 cf_108:cq_1 [] 1330555426413 false val_1
> row_109 cf_109:cq_1 [] 1330555426413 false val_1
> ...
>
> On Wed, Feb 29, 2012 at 4:30 PM, Keith Turner <[EMAIL PROTECTED]> wrote:
>> When you try to scan it calls IteratorUtil.loadIterators() which calls
>> AccumuloClassLoader.loadClass().  The AccumuloClassLoader expects
>> ACCUMULO_HOME env var to be set, if it is not it does some vodo to try
>> to figure things out.  This could be failing.  Are you setting
>> ACCUMULO_HOME ?
>>
>> On Mon, Feb 27, 2012 at 5:19 PM, Jason Trost <[EMAIL PROTECTED]> wrote:
>>> Any idea why this doesn't work (see code and stack trace below)?  I am
>>> using accumulo trunk.  This problem only occurs when I use a Scanner
>>> or BatchScanner.  If I comment out the scanning section there are no
>>> errors.
>>>
>>> Thanks,
>>>
>>> --Jason
>>>
>>> Java code (https://gist.github.com/1927202)
>>>
>>> package accumulo;
>>>
>>> import java.util.Map.Entry;
>>>
>>> import org.apache.accumulo.core.client.BatchWriter;
>>> import org.apache.accumulo.core.client.Connector;
>>> import org.apache.accumulo.core.client.Instance;
>>> import org.apache.accumulo.core.client.Scanner;
>>> import org.apache.accumulo.core.client.mock.MockInstance;
>>> import org.apache.accumulo.core.data.Key;
>>> import org.apache.accumulo.core.data.Mutation;
>>> import org.apache.accumulo.core.data.Value;
>>> import org.apache.accumulo.core.security.Authorizations;
>>>
>>> public class Mock {
>>>
>>>        public static void main(String[] args) throws Exception {
>>>                String table = "data";
>>>                String user = "root";
>>>                Instance inst = new MockInstance("inst");
>>>                Connector conn = inst.getConnector(user, "secret");
>>>                conn.securityOperations().changeUserAuthorizations(user, new