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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Unable to get data of znode /hbase/table/mytable.
Date Sun, 27 Apr 2014 17:36:24 GMT
I am adding cdh users mailing list where you would get good response to the
issue below.

Cheers


On Sun, Apr 27, 2014 at 10:30 AM, yeshwanth kumar <yeshwanth43@gmail.com>wrote:

> hi ted,
>
> i replaced the hbase 0.94.7 with cdh 0.94.6 version.
> i don't see any errors in regionservers  log but i am getting this
> exception in my tomcat webapp.
>
> javax.servlet.ServletException: java.lang.NoClassDefFoundError:
> org/apache/hadoop/net/SocketInputWrapper
>
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:420)
>
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
>
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>
> *root cause*
>
> java.lang.NoClassDefFoundError: org/apache/hadoop/net/SocketInputWrapper
>
> org.apache.hadoop.hbase.ipc.HBaseClient.createConnection(HBaseClient.java:255)
>
> org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:1120)
>         org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:980)
>
> org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:86)
>         com.sun.proxy.$Proxy66.getProtocolVersion(Unknown Source)
>
> org.apache.hadoop.hbase.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:138)
>
> org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:208)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1358)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1317)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1304)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:990)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:885)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:987)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:889)
>
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:846)
>         org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:270)
>         org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:210)
>         org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:169)
>
> com.serendio.penton.rest.server.CsvMgmtEndPoint.<init>(CsvMgmtEndPoint.java:76)
>         sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
>
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
>
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>         java.lang.reflect.Constructor.newInstance(Constructor.java:526)
>
> com.sun.jersey.server.spi.component.ResourceComponentConstructor._construct(ResourceComponentConstructor.java:191)
>
> com.sun.jersey.server.spi.component.ResourceComponentConstructor.construct(ResourceComponentConstructor.java:179)
>
> com.sun.jersey.server.impl.resource.PerRequestFactory$PerRequest._getInstance(PerRequestFactory.java:182)
>
> com.sun.jersey.server.impl.resource.PerRequestFactory$AbstractPerRequest.getInstance(PerRequestFactory.java:144)
>
> com.sun.jersey.server.impl.application.WebApplicationContext.getResource(WebApplicationContext.java:238)
>
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:83)
>
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
>
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
>
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
>
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
>
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
>
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
>
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
>
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
>
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>
>
> here's the pom i specified
>
>  <dependency>
>             <groupId>org.apache.hbase</groupId>
>             <artifactId>hbase</artifactId>
>         <version>0.94.6-cdh4.5.0</version>
>             <exclusions>
>                 <exclusion>
>                     <groupId> org.mortbay.jetty</groupId>
>                     <artifactId>jetty</artifactId>
>                 </exclusion>
>                 <exclusion>
>                     <groupId> org.mortbay.jetty</groupId>
>                     <artifactId>jetty-util</artifactId>
>                 </exclusion>
>                 <exclusion>
>                     <groupId> org.mortbay.jetty</groupId>
>                     <artifactId>jsp-api-2.1</artifactId>
>                 </exclusion>
>                 <exclusion>
>                     <groupId> org.mortbay.jetty</groupId>
>                     <artifactId>jsp-2.1</artifactId>
>                 </exclusion>
>                 <exclusion>
>                     <groupId> org.mortbay.jetty</groupId>
>                     <artifactId>servlet-api-2.5</artifactId>
>                 </exclusion>
>                 <exclusion>
>                     <groupId>tomcat</groupId>
>                     <artifactId>jasper-runtime</artifactId>
>                 </exclusion>
>                 <exclusion>
>                     <groupId>tomcat</groupId>
>                     <artifactId>jasper-compiler</artifactId>
>                 </exclusion>
>             </exclusions>
>         </dependency>
>
> can you help me out with this issue.
>
> thanks,
> yeshwanth.
>
>
>
>
>
> On Sun, Apr 27, 2014 at 10:32 PM, yeshwanth kumar <yeshwanth43@gmail.com
> >wrote:
>
> > here's the code snippet <http://pastebin.com/AGh7mTNT>
> >
> > thanks,
> > yeshwanth
> >
> >
> > On Sun, Apr 27, 2014 at 10:20 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> >
> >> Can you show us code snippet where you add filter to Scan object ?
> >>
> >> Thanks
> >>
> >> On Apr 27, 2014, at 9:43 AM, yeshwanth kumar <yeshwanth43@gmail.com>
> >> wrote:
> >>
> >> > hi ted,
> >> >
> >> > i am using fuzzyrow filter while scanning a table.
> >> > my cluster is running on HBase 0.94.6-cdh4.5.0
> >> > but in my webapp i specified hbase 0.94.7. dependency.
> >> >
> >> > even after changing the dependency i still see the same error.
> >> >
> >> > thanks,
> >> > yeshwanth.
> >> >
> >> >
> >> >
> >> >
> >> > On Sun, Apr 27, 2014 at 10:03 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> >> >
> >> >> Did the exception below happen when you were performing some query
on
> >> the
> >> >> region server ?
> >> >>
> >> >> Can you tell us a bit more whether your query uses FilterList ?
> >> >>
> >> >> Thanks
> >> >>
> >> >>
> >> >> On Sun, Apr 27, 2014 at 9:28 AM, yeshwanth kumar <
> >> yeshwanth43@gmail.com
> >> >>> wrote:
> >> >>
> >> >>> hi jean,
> >> >>>
> >> >>> i am using HBase 0.94.6-cdh4.5.0
> >> >>>
> >> >>> i found this in regionservers log,
> >> >>>
> >> >>> org.apache.hadoop.hbase.io.HbaseObjectWritable
> >> >>> Error in readFields
> >> >>> java.lang.ClassCastException:
> >> >>> org.apache.hadoop.hbase.snapshot.HSnapshotDescription cannot be
cast
> >> to
> >> >>> org.apache.hadoop.hbase.filter.Filter
> >> >>> at
> >> >>>
> >>
> org.apache.hadoop.hbase.filter.FilterList.readFields(FilterList.java:276)
> >> >>> at org.apache.hadoop.hbase.client.Scan.readFields(Scan.java:591)
> >> >>> at
> >> >>
> >>
> org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:689)
> >> >>> at
> >> org.apache.hadoop.hbase.ipc.Invocation.readFields(Invocation.java:127)
> >> >>> at
> >> >>
> >>
> org.apache.hadoop.hbase.ipc.HBaseServer$Connection.processData(HBaseServer.java:1313)
> >> >>> at
> >> >>
> >>
> org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServer.java:1228)
> >> >>> at
> >> >>
> >>
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:750)
> >> >>> at
> >> >>
> >>
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.doRunLoop(HBaseServer.java:541)
> >> >>> at
> >> >>
> >>
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java:516)
> >> >>> at
> >> >>
> >>
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> >> >>> at
> >> >>
> >>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> >> >>> at java.lang.Thread.run(Thread.java:744)
> >> >>>
> >> >>> how can i fix this dependency issue.
> >> >>>
> >> >>>
> >> >>>
> >> >>>
> >> >>> On Fri, Apr 25, 2014 at 9:06 PM, yeshwanth kumar <
> >> yeshwanth43@gmail.com
> >> >>>> wrote:
> >> >>>
> >> >>>> hi jean,
> >> >>>>
> >> >>>> i haven't written any piece of code to workaround znode,
> >> >>>> one of my rest endpoint in webapp reads data from hbase.
> >> >>>> it is giving me empty set.
> >> >>>> all if found in the logs is
> >> >>>>
> >> >>>> Reading reply sessionid:0x145974472760023, packet:: clientPath:null
> >> >>>> serverPath:null finished:false header:: 42,4 replyHeader::
> >> >>>> 42,77309411972,-101 request:: '/hbase/table/NCSVs,F response::
> >> >>>> hconnection-0x145974472760023 Unable to get data of znode
> >> >>>> /hbase/table/NCSVs because node does not exist (not an error)
> >> >>>>
> >> >>>> this is what i found in zookeeper client
> >> >>>>
> >> >>>> *$[zk: localhost:2181(CONNECTED) 14] ls /hbase*
> >> >>>> *[splitlog, online-snapshot, unassigned, table94,
> root-region-server,
> >> >> rs,
> >> >>>> backup-masters, table, draining, master, shutdown, hbaseid]*
> >> >>>>
> >> >>>>
> >> >>>> -yeshwanth
> >> >>>>
> >> >>>>
> >> >>>> On Fri, Apr 25, 2014 at 8:18 PM, Jean-Marc Spaggiari <
> >> >>>> jean-marc@spaggiari.org> wrote:
> >> >>>>
> >> >>>>> Hi Yeshwanth,
> >> >>>>>
> >> >>>>> What is your webapp looking at the ZNode? If you should
the Java
> >> >> client
> >> >>>>> and
> >> >>>>> not look at the ZNode. Not getting why it's looking there.
Do yo
> >> >> uknow?
> >> >>>>>
> >> >>>>> JM
> >> >>>>>
> >> >>>>>
> >> >>>>> 2014-04-25 2:01 GMT-04:00 yeshwanth kumar <yeshwanth43@gmail.com
> >:
> >> >>>>>
> >> >>>>>> hi matteo,
> >> >>>>>>
> >> >>>>>> my problem isn't solved yet.
> >> >>>>>> webapp isn't reading data from hbase.
> >> >>>>>> all i see in logs is znode /hbase/table/mytable doesn't
exist.
> >> >>>>>> but all my tables are present in /hbase/table94/
> >> >>>>>>
> >> >>>>>> so how can i fix this problem.
> >> >>>>>>
> >> >>>>>> thanks,
> >> >>>>>> yeshwanth
> >> >>>>>>
> >> >>>>>>
> >> >>>>>>
> >> >>>>>>
> >> >>>>>> On Tue, Apr 22, 2014 at 9:58 PM, Matteo Bertozzi <
> >> >>>>> theo.bertozzi@gmail.com
> >> >>>>>>> wrote:
> >> >>>>>>
> >> >>>>>>> that is already done by the server.
> >> >>>>>>> The ZooKeeperWatcher.java is using conf.get(
> >> >>>>>>> "zookeeper.znode.masterTableEnableDisable", "table94"));
> >> >>>>>>>
> >> >>>>>>> anyway, why are you looking at the znodes?
> >> >>>>>>> a client application should never look at the znodes.
> >> >>>>>>> The znodes are only carrying transient informations
used for
> >> >>>>> coordination
> >> >>>>>>>
> >> >>>>>>> Matteo
> >> >>>>>>>
> >> >>>>>>>
> >> >>>>>>>
> >> >>>>>>> On Tue, Apr 22, 2014 at 9:20 AM, yeshwanth kumar
<
> >> >>>>> yeshwanth43@gmail.com
> >> >>>>>>>> wrote:
> >> >>>>>>>
> >> >>>>>>>> hi matteo,
> >> >>>>>>>>
> >> >>>>>>>> how do i specify hbase znode to use /hbase/table94
 instead of
> >> >>>>>>> /hbase/table
> >> >>>>>>>>
> >> >>>>>>>> thanks
> >> >>>>>>>>
> >> >>>>>>>>
> >> >>>>>>>> On Tue, Apr 22, 2014 at 9:40 PM, Matteo Bertozzi
<
> >> >>>>>>> theo.bertozzi@gmail.com
> >> >>>>>>>>> wrote:
> >> >>>>>>>>
> >> >>>>>>>>> On Tue, Apr 22, 2014 at 9:00 AM, yeshwanth
kumar <
> >> >>>>>>> yeshwanth43@gmail.com
> >> >>>>>>>>>> wrote:
> >> >>>>>>>>>
> >> >>>>>>>>>> @matteo
> >> >>>>>>>>>> present znode is at /hbase/table where
it is empty.
> >> >>>>>>>>>> where as all my tables are present
in /hbase/table94
> >> >>>>>>>>>> now  webapp isn't reading the data
from hbase.
> >> >>>>>>>>>
> >> >>>>>>>>> cdh 4.5.0 doesn't write in /hbase/table
due to a compatibility
> >> >>>>> issue
> >> >>>>>>>>> /hbase/table94
> >> >>>>>>>>> is used.
> >> >>>>>>>>> (see HBASE-6710 for details)
> >> >>>>>>>>>
> >> >>>>>>>>> On Tue, Apr 22, 2014 at 6:56 PM, Matteo
Bertozzi <
> >> >>>>>>>> theo.bertozzi@gmail.com
> >> >>>>>>>>>> wrote:
> >> >>>>>>>>>
> >> >>>>>>>>>>
> >> >>>>>>>>>>> /hbase/table94 is a "compatibility"
znode that replaces
> >> >>>>>>> /hbase/table
> >> >>>>>>>>>>> if you want more details take a
look at HBASE-6710.
> >> >>>>>>>>>>>
> >> >>>>>>>>>>> what is the problem of looking
into /hbase/table94 instead
> >> >>> of
> >> >>>>>>>>>> /hbase/table?
> >> >>>>>>>>>>>
> >> >>>>>>>>>>> Matteo
> >> >>>>>>>>>>>
> >> >>>>>>>>>>>
> >> >>>>>>>>>>>
> >> >>>>>>>>>>> On Tue, Apr 22, 2014 at 5:18 AM,
yeshwanth kumar <
> >> >>>>>>>>> yeshwanth43@gmail.com
> >> >>>>>>>>>>>> wrote:
> >> >>>>>>>>>>>
> >> >>>>>>>>>>>> Hi,
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> i am running webapp written
on jaxrs framework which
> >> >>>>> performs
> >> >>>>>>> CRUD
> >> >>>>>>>>>>>> opereations on hbase.
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> app was working fine till last
week,
> >> >>>>>>>>>>>> now when i perform reading
opeartion  from hbase i don't
> >> >>> see
> >> >>>>>> any
> >> >>>>>>>>> data,
> >> >>>>>>>>>> i
> >> >>>>>>>>>>>> don't see any errors or exceptions
but i found this
> >> >> lines
> >> >>> in
> >> >>>>>> the
> >> >>>>>>>> log
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> *""Unable to get data of znode
/hbase/table/myTable
> >> >>> because
> >> >>>>>> node
> >> >>>>>>>> does
> >> >>>>>>>>>> not
> >> >>>>>>>>>>>> exist (not an error)"".*
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> i followed this<
> >> >>>>> https://blog.cloudera.com/blog/2013/10/what-are-hbase-znodes/>
> >> >>>>>>>>>>>> cloudera
> >> >>>>>>>>>>>> article about znodes and this
is what i found,
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> *$[zk: localhost:2181(CONNECTED)
14] ls /hbase*
> >> >>>>>>>>>>>> *[splitlog, online-snapshot,
unassigned, table94,
> >> >>>>>>>> root-region-server,
> >> >>>>>>>>>> rs,
> >> >>>>>>>>>>>> backup-masters, table, draining,
master, shutdown,
> >> >>> hbaseid]*
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> all the tables were present
in /hbase/table94, where as
> >> >>>>>>>> /hbase/table
> >> >>>>>>>>> is
> >> >>>>>>>>>>>> empty.
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> i know what is the problem
now,
> >> >>>>>>>>>>>> but i don't know how to solve
it.
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> can someone help me with this
issue.
> >> >>>>>>>>>>>>
> >> >>>>>>>>>>>> Thanks,
> >> >>>>>>>>>>>> Yeshwanth
> >> >>
> >>
> >
> >
>

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