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Posted to dev@hbase.apache.org by Pubudu Gunatilaka <pu...@gmail.com> on 2015/07/17 12:32:56 UTC
Hbase Fully distribution mode - Cannot resolve regionserver hostname
Hi Devs,
I am trying to run Hbase in fully distributed mode. So first I started
master node. Then I started regionserver. But I am getting following error.
2015-07-17 05:12:02,260 WARN [pod-35:16020.activeMasterManager]
master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740 to
pod-36,16020,1437109916288, trying to assign elsewhere instead; try=1 of 10
java.net.UnknownHostException: unknown host: pod-36
at
org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.<init>(RpcClientImpl.java:296)
at
org.apache.hadoop.hbase.ipc.RpcClientImpl.createConnection(RpcClientImpl.java:129)
at
org.apache.hadoop.hbase.ipc.RpcClientImpl.getConnection(RpcClientImpl.java:1278)
at org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1152)
at
org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:216)
at
org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:300)
at
org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:21711)
at
org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:712)
at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:2101)
at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1567)
at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1545)
at
org.apache.hadoop.hbase.master.AssignmentManager.assignMeta(AssignmentManager.java:2630)
at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:820)
at
org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:685)
at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:165)
at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1428)
at java.lang.Thread.run(Thread.java:745)
This error occurs as the master node cannot resolve the hostname of the
regionserver. According to the requirement of mine, I want to automate the
hbase installation with 1 master node and 4 regionservers. But at the
moment I don't have any possibility of updating master's /etc/hosts file.
>From the hbase configuration side, will I be able to solve the problem?
If the hbase can communicate with IP addresses or use the hostname, which
is already sent by regionserver to the master without updating /etc/hosts
file this issue can be solved. Similar approach can be found in hadoop as
well. Once the datanode connects to the namenode, it can communicate with
the datanode without updating /etc/hosts file.
Any help on this is appreciated.
Thank you!
--
*Pubudu Gunatilaka*
Re: Hbase Fully distribution mode - Cannot resolve regionserver hostname
Posted by Dima Spivak <ds...@cloudera.com>.
Hi Pubudu,
Please stop adding dev@ back to this email's recipient list; this isn't an
issue for HBase developers to address. Looking at what you've posted from
hbase-site.xml, I recommend you start with the HBase Ref Guide,
specifically section 2.4 on Fully Distributed setups [1]. I'd also
recommend trying to use hostnames instead of IP addresses in your
configurations, if possible; I've had issues in the past with DNS when
providing HBase with IP addresses instead of FQDNs.
[1] http://hbase.apache.org/book.html#quickstart_fully_distributed
-Dima
On Sat, Jul 18, 2015 at 6:33 AM, Pubudu Gunatilaka <pu...@gmail.com>
wrote:
> Hi,
>
> I looked into HBASE-12954. But could not figure out a way of solving the
> issue. I noticed one thing in region servers. When I try to add a region
> server separately, it adds as two servers. One from the ip address and
> other from the hostname. Is this an expected outcome? I have attached a
> screen shot.
>
> Following are the configurations of my hbase-site.xml.
>
> <configuration>
> <property>
> <name>hbase.rootdir</name>
> <value>hdfs://172.17.0.205:54310/hbase</value>
> </property>
>
> <property>
> <name>hbase.cluster.distributed</name>
> <value>true</value>
> </property>
>
> <property>
> <name>hbase.zookeeper.property.dataDir</name>
> <value>/opt/HBASE/zookeeper</value>
> </property>
>
> <property>
> <name>hbase.zookeeper.quorum</name>
> <value>172.17.0.207</value>
> </property>
>
> <property>
> <name>hbase.master.info.bindAddress</name>
> <value>172.17.0.216</value>
> </property>
>
> <property>
> <name>hbase.zookeeper.property.clientPort</name>
> <value>2181</value>
> </property>
>
> </configuration>
>
> Any help on this is appreciated.
>
> Thank you!
>
>
>
> On Sat, Jul 18, 2015 at 12:20 AM, Dima Spivak <ds...@cloudera.com>
> wrote:
>
>> +user@, dev@ to bcc
>>
>> Pubudu,
>>
>> I think you'll get more help on an issue like this on the users list.
>>
>> -Dima
>>
>> ---------- Forwarded message ----------
>> From: Ted Yu <yu...@gmail.com>
>> Date: Fri, Jul 17, 2015 at 5:40 AM
>> Subject: Re: Hbase Fully distribution mode - Cannot resolve regionserver
>> hostname
>> To: "dev@hbase.apache.org" <de...@hbase.apache.org>
>>
>>
>> Have you looked at
>> HBASE-12954 Ability impaired using HBase on multihomed hosts
>>
>> Cheers
>>
>> On Fri, Jul 17, 2015 at 3:32 AM, Pubudu Gunatilaka <pu...@gmail.com>
>> wrote:
>>
>> > Hi Devs,
>> >
>> > I am trying to run Hbase in fully distributed mode. So first I started
>> > master node. Then I started regionserver. But I am getting following
>> error.
>> >
>> > 2015-07-17 05:12:02,260 WARN [pod-35:16020.activeMasterManager]
>> > master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740
>> to
>> > pod-36,16020,1437109916288, trying to assign elsewhere instead; try=1 of
>> 10
>> > java.net.UnknownHostException: unknown host: pod-36
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.<init>(RpcClientImpl.java:296)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.ipc.RpcClientImpl.createConnection(RpcClientImpl.java:129)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.ipc.RpcClientImpl.getConnection(RpcClientImpl.java:1278)
>> > at
>> org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1152)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:216)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:300)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:21711)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:712)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:2101)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1567)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1545)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.master.AssignmentManager.assignMeta(AssignmentManager.java:2630)
>> > at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:820)
>> > at
>> >
>> >
>>
>> org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:685)
>> > at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:165)
>> > at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1428)
>> > at java.lang.Thread.run(Thread.java:745)
>> >
>> >
>> > This error occurs as the master node cannot resolve the hostname of the
>> > regionserver. According to the requirement of mine, I want to automate
>> the
>> > hbase installation with 1 master node and 4 regionservers. But at the
>> > moment I don't have any possibility of updating master's /etc/hosts
>> file.
>> > From the hbase configuration side, will I be able to solve the problem?
>> >
>> > If the hbase can communicate with IP addresses or use the hostname,
>> which
>> > is already sent by regionserver to the master without updating
>> /etc/hosts
>> > file this issue can be solved. Similar approach can be found in hadoop
>> as
>> > well. Once the datanode connects to the namenode, it can communicate
>> with
>> > the datanode without updating /etc/hosts file.
>> >
>> > Any help on this is appreciated.
>> >
>> > Thank you!
>> >
>> > --
>> >
>> > *Pubudu Gunatilaka*
>> >
>>
>
>
>
> --
>
> *Pubudu Gunatilaka*
>
>
Re: Hbase Fully distribution mode - Cannot resolve regionserver hostname
Posted by Pubudu Gunatilaka <pu...@gmail.com>.
Hi,
I looked into HBASE-12954. But could not figure out a way of solving the
issue. I noticed one thing in region servers. When I try to add a region
server separately, it adds as two servers. One from the ip address and
other from the hostname. Is this an expected outcome? I have attached a
screen shot.
Following are the configurations of my hbase-site.xml.
<configuration>
<property>
<name>hbase.rootdir</name>
<value>hdfs://172.17.0.205:54310/hbase</value>
</property>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
</property>
<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/opt/HBASE/zookeeper</value>
</property>
<property>
<name>hbase.zookeeper.quorum</name>
<value>172.17.0.207</value>
</property>
<property>
<name>hbase.master.info.bindAddress</name>
<value>172.17.0.216</value>
</property>
<property>
<name>hbase.zookeeper.property.clientPort</name>
<value>2181</value>
</property>
</configuration>
Any help on this is appreciated.
Thank you!
On Sat, Jul 18, 2015 at 12:20 AM, Dima Spivak <ds...@cloudera.com> wrote:
> +user@, dev@ to bcc
>
> Pubudu,
>
> I think you'll get more help on an issue like this on the users list.
>
> -Dima
>
> ---------- Forwarded message ----------
> From: Ted Yu <yu...@gmail.com>
> Date: Fri, Jul 17, 2015 at 5:40 AM
> Subject: Re: Hbase Fully distribution mode - Cannot resolve regionserver
> hostname
> To: "dev@hbase.apache.org" <de...@hbase.apache.org>
>
>
> Have you looked at
> HBASE-12954 Ability impaired using HBase on multihomed hosts
>
> Cheers
>
> On Fri, Jul 17, 2015 at 3:32 AM, Pubudu Gunatilaka <pu...@gmail.com>
> wrote:
>
> > Hi Devs,
> >
> > I am trying to run Hbase in fully distributed mode. So first I started
> > master node. Then I started regionserver. But I am getting following
> error.
> >
> > 2015-07-17 05:12:02,260 WARN [pod-35:16020.activeMasterManager]
> > master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740
> to
> > pod-36,16020,1437109916288, trying to assign elsewhere instead; try=1 of
> 10
> > java.net.UnknownHostException: unknown host: pod-36
> > at
> >
> >
>
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.<init>(RpcClientImpl.java:296)
> > at
> >
> >
>
> org.apache.hadoop.hbase.ipc.RpcClientImpl.createConnection(RpcClientImpl.java:129)
> > at
> >
> >
>
> org.apache.hadoop.hbase.ipc.RpcClientImpl.getConnection(RpcClientImpl.java:1278)
> > at
> org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1152)
> > at
> >
> >
>
> org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:216)
> > at
> >
> >
>
> org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:300)
> > at
> >
> >
>
> org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:21711)
> > at
> >
> >
>
> org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:712)
> > at
> >
> >
>
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:2101)
> > at
> >
> >
>
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1567)
> > at
> >
> >
>
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1545)
> > at
> >
> >
>
> org.apache.hadoop.hbase.master.AssignmentManager.assignMeta(AssignmentManager.java:2630)
> > at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:820)
> > at
> >
> >
>
> org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:685)
> > at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:165)
> > at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1428)
> > at java.lang.Thread.run(Thread.java:745)
> >
> >
> > This error occurs as the master node cannot resolve the hostname of the
> > regionserver. According to the requirement of mine, I want to automate
> the
> > hbase installation with 1 master node and 4 regionservers. But at the
> > moment I don't have any possibility of updating master's /etc/hosts file.
> > From the hbase configuration side, will I be able to solve the problem?
> >
> > If the hbase can communicate with IP addresses or use the hostname, which
> > is already sent by regionserver to the master without updating /etc/hosts
> > file this issue can be solved. Similar approach can be found in hadoop as
> > well. Once the datanode connects to the namenode, it can communicate with
> > the datanode without updating /etc/hosts file.
> >
> > Any help on this is appreciated.
> >
> > Thank you!
> >
> > --
> >
> > *Pubudu Gunatilaka*
> >
>
--
*Pubudu Gunatilaka*
Fwd: Hbase Fully distribution mode - Cannot resolve regionserver hostname
Posted by Dima Spivak <ds...@cloudera.com>.
+user@, dev@ to bcc
Pubudu,
I think you'll get more help on an issue like this on the users list.
-Dima
---------- Forwarded message ----------
From: Ted Yu <yu...@gmail.com>
Date: Fri, Jul 17, 2015 at 5:40 AM
Subject: Re: Hbase Fully distribution mode - Cannot resolve regionserver
hostname
To: "dev@hbase.apache.org" <de...@hbase.apache.org>
Have you looked at
HBASE-12954 Ability impaired using HBase on multihomed hosts
Cheers
On Fri, Jul 17, 2015 at 3:32 AM, Pubudu Gunatilaka <pu...@gmail.com>
wrote:
> Hi Devs,
>
> I am trying to run Hbase in fully distributed mode. So first I started
> master node. Then I started regionserver. But I am getting following
error.
>
> 2015-07-17 05:12:02,260 WARN [pod-35:16020.activeMasterManager]
> master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740 to
> pod-36,16020,1437109916288, trying to assign elsewhere instead; try=1 of
10
> java.net.UnknownHostException: unknown host: pod-36
> at
>
>
org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.<init>(RpcClientImpl.java:296)
> at
>
>
org.apache.hadoop.hbase.ipc.RpcClientImpl.createConnection(RpcClientImpl.java:129)
> at
>
>
org.apache.hadoop.hbase.ipc.RpcClientImpl.getConnection(RpcClientImpl.java:1278)
> at org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1152)
> at
>
>
org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:216)
> at
>
>
org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:300)
> at
>
>
org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:21711)
> at
>
>
org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:712)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:2101)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1567)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1545)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assignMeta(AssignmentManager.java:2630)
> at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:820)
> at
>
>
org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:685)
> at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:165)
> at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1428)
> at java.lang.Thread.run(Thread.java:745)
>
>
> This error occurs as the master node cannot resolve the hostname of the
> regionserver. According to the requirement of mine, I want to automate the
> hbase installation with 1 master node and 4 regionservers. But at the
> moment I don't have any possibility of updating master's /etc/hosts file.
> From the hbase configuration side, will I be able to solve the problem?
>
> If the hbase can communicate with IP addresses or use the hostname, which
> is already sent by regionserver to the master without updating /etc/hosts
> file this issue can be solved. Similar approach can be found in hadoop as
> well. Once the datanode connects to the namenode, it can communicate with
> the datanode without updating /etc/hosts file.
>
> Any help on this is appreciated.
>
> Thank you!
>
> --
>
> *Pubudu Gunatilaka*
>
Fwd: Hbase Fully distribution mode - Cannot resolve regionserver hostname
Posted by Dima Spivak <ds...@cloudera.com>.
+user@, dev@ to bcc
Pubudu,
I think you'll get more help on an issue like this on the users list.
-Dima
---------- Forwarded message ----------
From: Ted Yu <yu...@gmail.com>
Date: Fri, Jul 17, 2015 at 5:40 AM
Subject: Re: Hbase Fully distribution mode - Cannot resolve regionserver
hostname
To: "dev@hbase.apache.org" <de...@hbase.apache.org>
Have you looked at
HBASE-12954 Ability impaired using HBase on multihomed hosts
Cheers
On Fri, Jul 17, 2015 at 3:32 AM, Pubudu Gunatilaka <pu...@gmail.com>
wrote:
> Hi Devs,
>
> I am trying to run Hbase in fully distributed mode. So first I started
> master node. Then I started regionserver. But I am getting following
error.
>
> 2015-07-17 05:12:02,260 WARN [pod-35:16020.activeMasterManager]
> master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740 to
> pod-36,16020,1437109916288, trying to assign elsewhere instead; try=1 of
10
> java.net.UnknownHostException: unknown host: pod-36
> at
>
>
org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.<init>(RpcClientImpl.java:296)
> at
>
>
org.apache.hadoop.hbase.ipc.RpcClientImpl.createConnection(RpcClientImpl.java:129)
> at
>
>
org.apache.hadoop.hbase.ipc.RpcClientImpl.getConnection(RpcClientImpl.java:1278)
> at org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1152)
> at
>
>
org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:216)
> at
>
>
org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:300)
> at
>
>
org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:21711)
> at
>
>
org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:712)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:2101)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1567)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1545)
> at
>
>
org.apache.hadoop.hbase.master.AssignmentManager.assignMeta(AssignmentManager.java:2630)
> at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:820)
> at
>
>
org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:685)
> at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:165)
> at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1428)
> at java.lang.Thread.run(Thread.java:745)
>
>
> This error occurs as the master node cannot resolve the hostname of the
> regionserver. According to the requirement of mine, I want to automate the
> hbase installation with 1 master node and 4 regionservers. But at the
> moment I don't have any possibility of updating master's /etc/hosts file.
> From the hbase configuration side, will I be able to solve the problem?
>
> If the hbase can communicate with IP addresses or use the hostname, which
> is already sent by regionserver to the master without updating /etc/hosts
> file this issue can be solved. Similar approach can be found in hadoop as
> well. Once the datanode connects to the namenode, it can communicate with
> the datanode without updating /etc/hosts file.
>
> Any help on this is appreciated.
>
> Thank you!
>
> --
>
> *Pubudu Gunatilaka*
>
Re: Hbase Fully distribution mode - Cannot resolve regionserver hostname
Posted by Ted Yu <yu...@gmail.com>.
Have you looked at
HBASE-12954 Ability impaired using HBase on multihomed hosts
Cheers
On Fri, Jul 17, 2015 at 3:32 AM, Pubudu Gunatilaka <pu...@gmail.com>
wrote:
> Hi Devs,
>
> I am trying to run Hbase in fully distributed mode. So first I started
> master node. Then I started regionserver. But I am getting following error.
>
> 2015-07-17 05:12:02,260 WARN [pod-35:16020.activeMasterManager]
> master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740 to
> pod-36,16020,1437109916288, trying to assign elsewhere instead; try=1 of 10
> java.net.UnknownHostException: unknown host: pod-36
> at
>
> org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.<init>(RpcClientImpl.java:296)
> at
>
> org.apache.hadoop.hbase.ipc.RpcClientImpl.createConnection(RpcClientImpl.java:129)
> at
>
> org.apache.hadoop.hbase.ipc.RpcClientImpl.getConnection(RpcClientImpl.java:1278)
> at org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1152)
> at
>
> org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:216)
> at
>
> org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:300)
> at
>
> org.apache.hadoop.hbase.protobuf.generated.AdminProtos$AdminService$BlockingStub.openRegion(AdminProtos.java:21711)
> at
>
> org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:712)
> at
>
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:2101)
> at
>
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1567)
> at
>
> org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1545)
> at
>
> org.apache.hadoop.hbase.master.AssignmentManager.assignMeta(AssignmentManager.java:2630)
> at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:820)
> at
>
> org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:685)
> at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:165)
> at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1428)
> at java.lang.Thread.run(Thread.java:745)
>
>
> This error occurs as the master node cannot resolve the hostname of the
> regionserver. According to the requirement of mine, I want to automate the
> hbase installation with 1 master node and 4 regionservers. But at the
> moment I don't have any possibility of updating master's /etc/hosts file.
> From the hbase configuration side, will I be able to solve the problem?
>
> If the hbase can communicate with IP addresses or use the hostname, which
> is already sent by regionserver to the master without updating /etc/hosts
> file this issue can be solved. Similar approach can be found in hadoop as
> well. Once the datanode connects to the namenode, it can communicate with
> the datanode without updating /etc/hosts file.
>
> Any help on this is appreciated.
>
> Thank you!
>
> --
>
> *Pubudu Gunatilaka*
>