Does Hbase read .bashrc file??
Hello list, Does Hbase read the environment variables set in *~/.bashrc*file everytime I issue *bin/start-hbase.sh*??What could be the possible reasons for that?Specially if I have a standalone setup on my local FS. Thank you so much for your time. Warm Regards, Tariq cloudfront.blogspot.com
Re: Does Hbase read .bashrc file??
The start script is a shell script and it forks a new shell when the script is executed. That'll source the bashrc file. On May 11, 2013, at 12:39 PM, Mohammad Tariq donta...@gmail.com wrote: Hello list, Does Hbase read the environment variables set in *~/.bashrc*file everytime I issue *bin/start-hbase.sh*??What could be the possible reasons for that?Specially if I have a standalone setup on my local FS. Thank you so much for your time. Warm Regards, Tariq cloudfront.blogspot.com
Re: Does Hbase read .bashrc file??
Hello Aman, Thank you so much for the quick response. But why would that happen? I mean the required env variables are present in hbase-env.sh already. What is the need to source bashrc? Consider a scenario wherein you want to run Hbase in standalone mode. You have a Hadoop setup on the same machine and HADOOP_HOME is set in bashrc, but you don't want to use hadoop for some reason. In that case Hbase will face connection issues as it'll try to contact the Hadoop host(as HADOOP_HOME is present in bashrc) which is not running because it is standalone setup. On the other hand if you are running Hbase in pseudo distributed mode and if you haven't set HADOOP_HOME in bashrc, it would still work. I'm sorry to be a pest of questions. I am actually not able to understand this. Pardon my ignorance. Warm Regards, Tariq cloudfront.blogspot.com On Sun, May 12, 2013 at 1:14 AM, Amandeep Khurana ama...@gmail.com wrote: The start script is a shell script and it forks a new shell when the script is executed. That'll source the bashrc file. On May 11, 2013, at 12:39 PM, Mohammad Tariq donta...@gmail.com wrote: Hello list, Does Hbase read the environment variables set in *~/.bashrc*file everytime I issue *bin/start-hbase.sh*??What could be the possible reasons for that?Specially if I have a standalone setup on my local FS. Thank you so much for your time. Warm Regards, Tariq cloudfront.blogspot.com
Re: Does Hbase read .bashrc file??
On Sat, May 11, 2013 at 1:02 PM, Mohammad Tariq donta...@gmail.com wrote: Hello Aman, Thank you so much for the quick response. But why would that happen? I mean the required env variables are present in hbase-env.sh already. What is the need to source bashrc? Consider a scenario wherein you want to run Hbase in standalone mode. You have a Hadoop setup on the same machine and HADOOP_HOME is set in bashrc, but you don't want to use hadoop for some reason. In that case Hbase will face connection issues as it'll try to contact the Hadoop host(as HADOOP_HOME is present in bashrc) which is not running because it is standalone setup. On the other hand if you are running Hbase in pseudo distributed mode and if you haven't set HADOOP_HOME in bashrc, it would still work. I'm sorry to be a pest of questions. I am actually not able to understand this. Pardon my ignorance. Hey Tariq: We generally try to avoid picking up anything from the environment. This is why you have define where you want to get your JAVA, etc., from in the hbase configuration. Is there something in particular that we are finding in .bashrc that you notice? Thanks, St.Ack
Re: Does Hbase read .bashrc file??
Hello sir, Long time :) Yeah, my understanding was same as whatever you have written. But today I noticed that Hbase is picking HADOOP_HOME from bashrc when I was trying to run it in standalone mode(on my local FS). Although all the Hadoop daemons were stopped and Hbase was configured to run in standalone mode, it was still trying to reach hdfs://localhost:9000 and hence getting : java.net.ConnectException: Call to localhost/127.0.0.1:9000 failed on connection exception: . So I arrived at the conclusion that if I have HADOOP_HOME set in bashrc, Hbase will try to search for the NN neglecting the properties set in hbase-site.xml. And once I commented out HADOOP_HOME in bashrc, everything started behaving just perfectly. Thank you. Warm Regards, Tariq cloudfront.blogspot.com On Sun, May 12, 2013 at 2:02 AM, Stack st...@duboce.net wrote: On Sat, May 11, 2013 at 1:02 PM, Mohammad Tariq donta...@gmail.com wrote: Hello Aman, Thank you so much for the quick response. But why would that happen? I mean the required env variables are present in hbase-env.sh already. What is the need to source bashrc? Consider a scenario wherein you want to run Hbase in standalone mode. You have a Hadoop setup on the same machine and HADOOP_HOME is set in bashrc, but you don't want to use hadoop for some reason. In that case Hbase will face connection issues as it'll try to contact the Hadoop host(as HADOOP_HOME is present in bashrc) which is not running because it is standalone setup. On the other hand if you are running Hbase in pseudo distributed mode and if you haven't set HADOOP_HOME in bashrc, it would still work. I'm sorry to be a pest of questions. I am actually not able to understand this. Pardon my ignorance. Hey Tariq: We generally try to avoid picking up anything from the environment. This is why you have define where you want to get your JAVA, etc., from in the hbase configuration. Is there something in particular that we are finding in .bashrc that you notice? Thanks, St.Ack
Re: Does Hbase read .bashrc file??
The #!/usr/bin/bash command in the script tells the shell to execute the script as a bash script. The execution is done by forking off a new shell instance, inside of which the bashrc is sourced automatically. It's not a HBase script specific phenomena. Like you said - removing the HADOOP_HOME env variable from the bashrc would solve the problem. On Sat, May 11, 2013 at 1:02 PM, Mohammad Tariq donta...@gmail.com wrote: Hello Aman, Thank you so much for the quick response. But why would that happen? I mean the required env variables are present in hbase-env.sh already. What is the need to source bashrc? Consider a scenario wherein you want to run Hbase in standalone mode. You have a Hadoop setup on the same machine and HADOOP_HOME is set in bashrc, but you don't want to use hadoop for some reason. In that case Hbase will face connection issues as it'll try to contact the Hadoop host(as HADOOP_HOME is present in bashrc) which is not running because it is standalone setup. On the other hand if you are running Hbase in pseudo distributed mode and if you haven't set HADOOP_HOME in bashrc, it would still work. I'm sorry to be a pest of questions. I am actually not able to understand this. Pardon my ignorance. Warm Regards, Tariq cloudfront.blogspot.com On Sun, May 12, 2013 at 1:14 AM, Amandeep Khurana ama...@gmail.com wrote: The start script is a shell script and it forks a new shell when the script is executed. That'll source the bashrc file. On May 11, 2013, at 12:39 PM, Mohammad Tariq donta...@gmail.com wrote: Hello list, Does Hbase read the environment variables set in *~/.bashrc*file everytime I issue *bin/start-hbase.sh*??What could be the possible reasons for that?Specially if I have a standalone setup on my local FS. Thank you so much for your time. Warm Regards, Tariq cloudfront.blogspot.com
Re: Does Hbase read .bashrc file??
I see. It was actually a Linux thing. Thank you so much for the clarification. Warm Regards, Tariq cloudfront.blogspot.com On Sun, May 12, 2013 at 4:51 AM, Amandeep Khurana ama...@gmail.com wrote: The #!/usr/bin/bash command in the script tells the shell to execute the script as a bash script. The execution is done by forking off a new shell instance, inside of which the bashrc is sourced automatically. It's not a HBase script specific phenomena. Like you said - removing the HADOOP_HOME env variable from the bashrc would solve the problem. On Sat, May 11, 2013 at 1:02 PM, Mohammad Tariq donta...@gmail.com wrote: Hello Aman, Thank you so much for the quick response. But why would that happen? I mean the required env variables are present in hbase-env.sh already. What is the need to source bashrc? Consider a scenario wherein you want to run Hbase in standalone mode. You have a Hadoop setup on the same machine and HADOOP_HOME is set in bashrc, but you don't want to use hadoop for some reason. In that case Hbase will face connection issues as it'll try to contact the Hadoop host(as HADOOP_HOME is present in bashrc) which is not running because it is standalone setup. On the other hand if you are running Hbase in pseudo distributed mode and if you haven't set HADOOP_HOME in bashrc, it would still work. I'm sorry to be a pest of questions. I am actually not able to understand this. Pardon my ignorance. Warm Regards, Tariq cloudfront.blogspot.com On Sun, May 12, 2013 at 1:14 AM, Amandeep Khurana ama...@gmail.com wrote: The start script is a shell script and it forks a new shell when the script is executed. That'll source the bashrc file. On May 11, 2013, at 12:39 PM, Mohammad Tariq donta...@gmail.com wrote: Hello list, Does Hbase read the environment variables set in *~/.bashrc*file everytime I issue *bin/start-hbase.sh*??What could be the possible reasons for that?Specially if I have a standalone setup on my local FS. Thank you so much for your time. Warm Regards, Tariq cloudfront.blogspot.com
