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From ke...@deenlo.com
Subject Re: Review Request 17860: Review of changes that remove the necessity for ACCUMULO_LOG_HOST
Date Mon, 10 Feb 2014 23:24:12 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/17860/#review34124
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server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java
<https://reviews.apache.org/r/17860/#comment64101>

    Have you manually tested upgrade? 
    
    It may be better to put this w/ the zookeeper upgrade code in Master.  Would make it easier
when someones working on 1.7 upgrade to be aware of it and possibly remove it.



server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java
<https://reviews.apache.org/r/17860/#comment64099>

    Should this code be shared w/ master instead of duplicating?



server/src/main/java/org/apache/accumulo/server/watcher/MonitorLog4jWatcher.java
<https://reviews.apache.org/r/17860/#comment64110>

    should this code block be synchronized?  just wondering if it should be mutually exclusive
w/ the code that enables logging.  



server/src/main/java/org/apache/accumulo/server/watcher/MonitorLog4jWatcher.java
<https://reviews.apache.org/r/17860/#comment64116>

    stylistic comment, feel free to ignore.
    
    
    Could catch NoNodeException (before catching KeeperException) and put code in if(NONODE){}
in catch block


- kturner


On Feb. 10, 2014, 10:26 p.m., Josh Elser wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/17860/
> -----------------------------------------------------------
> 
> (Updated Feb. 10, 2014, 10:26 p.m.)
> 
> 
> Review request for accumulo.
> 
> 
> Bugs: ACCUMULO-2334
>     https://issues.apache.org/jira/browse/ACCUMULO-2334
> 
> 
> Repository: accumulo
> 
> 
> Description
> -------
> 
> Removes the necessity to compute and set ACCUMULO_LOG_HOST. We can accomplish this by
having the monitor advertise a host in addition to just the port and have the other processes
place a watcher on that node in zookeeper.
> 
> This has some nice benefits to simplifying the code, removing the annoying (IMO) ACCUMULO_LOG_HOST
variable, and, when running the monitor on a random port, the other services can auto-discover
without having to update configuration files and restart the services. The auto-discovery
also has benefit if the monitor has to be moved to a different host (or multiple monitors
are being run with "failover")
> 
> 
> Diffs
> -----
> 
>   conf/examples/1GB/native-standalone/accumulo-env.sh aa4a1d0 
>   conf/examples/1GB/standalone/accumulo-env.sh 1707f3d 
>   conf/examples/2GB/native-standalone/accumulo-env.sh ef74ca7 
>   conf/examples/2GB/standalone/accumulo-env.sh 75014c2 
>   conf/examples/3GB/native-standalone/accumulo-env.sh ae0da11 
>   conf/examples/3GB/standalone/accumulo-env.sh 7edd938 
>   conf/examples/512MB/native-standalone/accumulo-env.sh 749a678 
>   conf/examples/512MB/standalone/accumulo-env.sh 9beb059 
>   core/src/main/java/org/apache/accumulo/core/Constants.java 9bb3419 
>   core/src/main/java/org/apache/accumulo/core/conf/Property.java 424b737 
>   core/src/main/java/org/apache/accumulo/core/util/AddressUtil.java af9a1a6 
>   server/src/main/java/org/apache/accumulo/server/Accumulo.java f4da33b 
>   server/src/main/java/org/apache/accumulo/server/monitor/LogService.java 10ef9e4 
>   server/src/main/java/org/apache/accumulo/server/monitor/Monitor.java dcb80fd 
>   server/src/main/java/org/apache/accumulo/server/util/Info.java 7a07107 
>   server/src/main/java/org/apache/accumulo/server/util/Initialize.java baa5400 
>   server/src/main/java/org/apache/accumulo/server/watcher/MonitorLog4jWatcher.java PRE-CREATION

> 
> Diff: https://reviews.apache.org/r/17860/diff/
> 
> 
> Testing
> -------
> 
> Local testing so far. Configure the monitor to use a random log4j port, start an instance.
Then, test log forwarding works. Restart the monitor, check that the tserver saw the update,
and that log forwarding still works even though the monitor is now listening on a different
port for log4j.
> 
> 
> Thanks,
> 
> Josh Elser
> 
>


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