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On Jan 6, 2015, at 9:25 AM, Bobby Evans ev...@yahoo-inc.com.INVALID wrote:
https://github.com/apache/hadoop-commonhas a default branch of some really
old odd branch HADOOP-3628. Any way we can change this to trunk? Anyone who
goes to github looking for hadoop is going to see old/wrong
Hey folks:
Deep linked by http://wiki.apache.org/hadoop/CodeReviewChecklist is the
rule that line length should be ideally maximum 80 chars. (Sun coding
guidelines.) In general, it's a good idea and it works for many many
languages...
Now the caveat.
As most of you know, I've been
On Sep 7, 2011, at 6:19 AM, Marco Cadetg wrote:
Current situation:
3 slaves with each two 320GB disks in RAID 1. All the disks show high read
errors and io throughput has gone below 5Mb/s without running any hadoop
job. (It looks like it will fall apart soon...)
One the special
On Sep 7, 2011, at 9:15 AM, Arun C Murthy wrote:
Using real data helps - from Apache Jira, here are the statistics for work on
trunk/hadoop-0.23 in Q3 of 2011 (i.e. last 2 months alone):
Hadoop Common - 224 resolved* jiras
Hadoop HDFS - 153 resolved* jiras
Hadoop MapReduce - 161* resolved
On Aug 10, 2011, at 7:56 AM, Evert Lammerts wrote:
A short, slightly off-topic question:
Also note that in this configuration that one cannot take
advantage of the keep the machine up at all costs features in newer
Hadoop's, which require that root, swap, and the log area be mirrored
On Aug 4, 2011, at 11:03 AM, Alejandro Abdelnur wrote:
What is the rationale for having the hadoop JARs outside of the lib/
directory?
It would definitely simplify packaging configuration if they are under lib/
as well.
Any objection to it?
It needs a big release note as this
On Aug 1, 2011, at 11:22 PM, Nigel Daley wrote:
Ideally the hardware is:
* hosted and OS managed by the donor,
* publicly addressable on the internet,
* running Ubuntu or CentOS, and
* sudo access can be given to Apache's Jenkins admins so they can create
accounts for committers as
On Aug 2, 2011, at 12:19 PM, milind.bhandar...@emc.com
milind.bhandar...@emc.com wrote:
1. Cut a release 0.22.0 without mapreduce-2178 patch, with
hadoop.security.authentication set to simple (I.e. No authentication).
Make sure that MR-2178 is highlighted as known-issue in the top-level dir
On Jul 30, 2011, at 9:52 PM, Nan Zhu wrote:
So, will the hadoop system co-exist with other workload in your data
centers?
No.
On Jul 25, 2011, at 11:59 AM, Eli Collins wrote:
Note! MR2 supports the current job
API - users don't need to rewrite their jobs to run on MR2 - this is
about the MR *implementation* not job compatibility. Note that the
move to MR2 will affect some APIs (eg metrics, contrib projects that
On Jul 20, 2011, at 2:26 PM, Eli Collins wrote:
Btw, Alejandro is contributing a full HDFS proxy replacement (also
supports read/write, kerberos, etc) in HDFS-2178.
Which is basically blocked by Alfredo's lack of security review.
On Jul 20, 2011, at 2:55 PM, Eli Collins wrote:
I don't think we should remove HDFSProxy because Hoop exists, I think
we should remove it because it's broken and not being maintained.
Broken and un-maintained code should be removed no?
That'd remove large chunks of hadoop.
On Jul 13, 2011, at 6:01 PM, Eli Collins wrote:
In order to support HA in a dot release we'll need to merge in the
branch for HDFS-1623, but that shouldn't hold up branching for 23.
Sanjay mentioned this as the summit but I wanted to double check with
you, you support a dot release of 23
What is the policy for cleansing the PMC and marking them as emeritus?
How much dead weight does there need to be before it gets pruned?
On Jun 24, 2011, at 9:47 AM, Eli Collins wrote:
Off list I said I thought any of the logos were acceptable choices
modulo some design tweaks, and that if the circle logo concept is
accepted it would be good to adjust the circle itself. But the PMC
did not vote for the circle logo, so it's
On Jun 23, 2011, at 5:47 AM, Steve Loughran wrote:
On 22/06/2011 17:27, Allen Wittenauer wrote:
On Jun 22, 2011, at 2:30 AM, Steve Loughran wrote:
I haven't even heard of anyone who owns up to moving to ext4 fs underneath.
Yes you do.
:D
Did it work?
and RHEL6.0
On Jun 22, 2011, at 2:30 AM, Steve Loughran wrote:
I haven't even heard of anyone who owns up to moving to ext4 fs underneath.
Yes you do.
:D
On Jun 22, 2011, at 1:27 PM, Scott Carey wrote:
Problems have been reported with Hadoop, the 64-bit JVM and Compressed
Object References (the -XX:+UseCompressedOops option), so use of that
option is discouraged.
I think the above is dated. It also lacks critical information. What JVM
and
On Jun 21, 2011, at 4:39 AM, Steve Loughran wrote:
If I can actually bring up a heterogenous cluster here
I believe there was a post in one of the mailing lists in the past 6
months where someone tried a mixed endian grid. It blew up big time.
On Jun 21, 2011, at 12:04 PM, Ted Dunning wrote:
For the pain in doing this, it is probably better to just drop $10 and bring
up a nice EC2 cluster with 10 m1.large instances using spot pricing for 5
hours.
Testing on non-Intel, non-Linux is something we need to do more of.
On Jun 17, 2011, at 12:36 AM, Ryan Rawson wrote:
HDFS-918 and HDFS-347 are absolutely critical for random read
performance. The smarter sites are already running HDFS-347 (I guess
they aren't running Hadoop then?), and soon they will be testing and
running HDFS-918 as well. Opening 1
On Jun 17, 2011, at 10:31 AM, Allen Wittenauer wrote:
On Jun 17, 2011, at 12:17 AM, Eric Baldeschwieler wrote:
Yahoo stands ready to help us (the Apache Hadoop Community) turn this new
release into a stable release by running it through its 9 month test and
burn in process. The result
On Jun 17, 2011, at 7:02 PM, Rajiv Chittajallu wrote:
Allen Wittenauer wrote on 06/17/11 at 13:27:43 -0700:
Actually, I was just reminded about the complete disaster that is
metrics. So while it may be pseudo-stable, it isn't actually usable for
anyone but Yahoo!.
Did you try
On Jun 15, 2011, at 1:44 AM, Ted Dunning wrote:
4, 2, 6
Yes. That isn't enough votes, but I think that the other logos don't cut
the mustard for various reasons. 5 is a recycled product logo and I don't
think the others make the required visual case.
+1
4,2,6
On Jun 14, 2011, at 3:56 PM, Owen O'Malley wrote:
All,
Steve Loughran has done some great work on defining what can be called
Hadoop at http://wiki.apache.org/hadoop/Defining%20Hadoop. After some cleanup
from Noirin and Shane, I think we've got a really good base. I'd like a vote
to
On Jun 14, 2011, at 6:45 PM, Eli Collins wrote:
Are we really going to go after all the web companies that patch in an
enhancement to their current Hadoop build and tell them to stop saying
that they are using Hadoop? You've patched Hadoop many times, should
your employer not be able to say
On Jun 8, 2011, at 6:53 AM, Doug Meil wrote:
Re: How closely related does a project need to be to get this privilege?
/ What is the criteria by which an API gets opened to something outside of
the Hadoop umbrella
Given the context of the original question, is this debate really
I have some concerns over the recent usage of LimitedPrivate being
opened up to HBase. Shouldn't HBase really be sticking to public APIs rather
than poking through some holes? If HBase needs an API, wouldn't other clients
as well?
On Jun 6, 2011, at 10:00 AM, Todd Lipcon wrote:
On Mon, Jun 6, 2011 at 9:45 AM, Allen Wittenauer a...@apache.org wrote:
I have some concerns over the recent usage of LimitedPrivate being
opened up to HBase. Shouldn't HBase really be sticking to public APIs
rather than poking
On Jun 6, 2011, at 11:34 AM, Stack wrote:
On Mon, Jun 6, 2011 at 9:45 AM, Allen Wittenauer a...@apache.org wrote:
I have some concerns over the recent usage of LimitedPrivate being
opened up to HBase. Shouldn't HBase really be sticking to public APIs
rather than poking through
On Jun 6, 2011, at 4:22 PM, Andrew Purtell wrote:
Perhaps opening a jira for a cleaner framework for HttpServer extension could
be useful?
Sure. That's probably what should have happened to begin with rather
than the quickly changing the API to a different classification. I was a
On Jun 6, 2011, at 6:08 PM, Todd Lipcon wrote:
Let's face it: this happened because it was HBase. If it was almost
anyone else, it would have sat there and *that's* the point where I'm
mainly concerned.
If you want to feel better, take a look at HDFS-941, HDFS-347, and
On Jun 2, 2011, at 11:06 AM, Konstantin Shvachko wrote:
I propose just to make them blockers before committing to attract attention
of the release manager and get his approval.
The traditional response has almost always been that they get changed to
non-blockers before release. One person's
On Jun 1, 2011, at 1:50 PM, Eric Baldeschwieler wrote:
makes sense to me, but it might be good to work to make these decisions
visible so folks can understand what is happening.
lol
On May 16, 2011, at 11:03 AM, Evert Lammerts wrote:
Hi all,
What acceptance tests are people using when buying clusters for Hadoop? Any
pointers to relevant methods?
We get some test nodes from various manufacturers. We do some raw IO
benchmarking vs. our other nodes. We add
On May 16, 2011, at 2:09 PM, Eli Collins wrote:
Allen,
There are few things in Hadoop in CDH that are not in trunk,
branch-20-security, or branch-20-append. The stuff in this category
is not major (eg HADOOP-6605, better JAVA_HOME detection).
But that's my point: when is it no
On May 13, 2011, at 1:53 AM, Doug Cutting wrote:
Here certified is probably just intended to mean that the software
uses a certified open source license, e.g., listed at
http://www.opensource.org/licenses/. However they should say that this
includes or contains the various Apache products,
On May 13, 2011, at 2:55 PM, Doug Cutting wrote:
On 05/13/2011 07:28 PM, Allen Wittenauer wrote:
If it has a modified version of Hadoop (i.e., not an actual Apache
release or patches which have never been committed to trunk), are
they allowed to say includes Apache Hadoop?
No. Those
On May 13, 2011, at 3:16 PM, Doug Cutting wrote:
On 05/14/2011 12:13 AM, Allen Wittenauer wrote:
So what do we do about companies that release a product that says includes
Apache Hadoop but includes patches that aren't committed to trunk?
We yell at them to get those patches into trunk
On May 13, 2011, at 3:53 PM, Ted Dunning wrote:
But distribution Z includes X kind of implies the existence of some such
that X != Y, Y != empty-set and X+Y = Z, at least in common usage.
Isn't that the same as a non-trunk change?
So doesn't this mean that your question reduces to the
On May 12, 2011, at 2:23 AM, Steve Loughran wrote:
I think Sun NFS might be a good example of similar defacto standard, or MS
SMB -it is up to others to show they are compatible with what is effective
the reference implementation. Being closed source, there is no option for
anyone to
On May 11, 2011, at 1:20 PM, Owen O'Malley wrote:
We haven't cleaned up the version documentation in a long time:
lrwxrwxr-x 1 omalley hadoop 11 May 11 20:14 current - r0.20.203.0
^--- this is a much more interesting discussion.
(What does current mean now?)
On May 6, 2011, at 11:18 PM, Milind Bhandarkar wrote:
Allen, there are per job limits, and per user limits in this branch. (So,
max capacity of -1 is for the queue, but within the queue, the per user
limits come into picture.) If I remember right, the defaults were based on
a certain
On May 5, 2011, at 1:56 PM, Jakob Homan wrote:
+1
Downloaded, verified, tested on single node cluster to my
satisfaction. We've also brought this release up on a sizable cluster
and checked its basic sanity.
All of you people doing single node tests are missing stuff. For
On May 6, 2011, at 6:43 PM, Todd Papaioannou wrote:
Allen,
Can you provide some more details into what issues you are seeing with the
capacity scheduler? Is it just the docs don't match the code, or are you
seeing real issues with job scheduling?
Jobs are definitely not getting
On May 4, 2011, at 10:31 AM, Owen O'Malley wrote:
Here's an updated release candidate for 0.20.203.0. I've incorporated the
feedback and included all of the patches from 0.20.2, which is the last
stable release. I also fixed the eclipse-plugin problem.
The candidate is at:
On Apr 13, 2011, at 4:16 PM, Tsz Wo (Nicholas), Sze wrote:
Hi all,
The Hadoop PMC has elected Koji Noguchi as a committer of Hadoop
Common/HDFS/MapReduce and he has accepted. Welcome aboard Koji!
Yay! Congrats!
Now there are even more people who Nicolas can attack about
On Mar 3, 2011, at 5:59 AM, Ian Holsman wrote:
I just discovered this Apache site,
Apache Sonar performs source code analysis on the java code, and it looks
pretty, and I'm sure some people would find it useful.
Is it actually returning for anyone else? I get a time out.
On Mar 3, 2011, at 10:13 AM, Allen Wittenauer wrote:
On Mar 3, 2011, at 5:59 AM, Ian Holsman wrote:
I just discovered this Apache site,
Apache Sonar performs source code analysis on the java code, and it looks
pretty, and I'm sure some people would find it useful
On Feb 18, 2011, at 2:11 AM, Bernd Fondermann wrote:
I don't know how many Y-employees are working on H internally. Only
the contributors can sort that out.
Did Carol Bartz run over your puppy or something? You don't appear to
realize that pretty much all the major companies that
On Feb 16, 2011, at 11:50 AM, Konstantin Boudnik wrote:
As Joep said this ...will reduce the effort to take any (set of ) changes
from development into production. Take it one step further: when your cluster
is 'assembled' you need to validate it (on top of a concrete OS, etc.); is it
On Feb 17, 2011, at 4:43 AM, Bernd Fondermann wrote:
To be honest: Hadoop is in the process of falling apart.
We can thank the Apache Board for helping there as well. Their high
handed interference basically set the project back 6 mos to a year; we're still
recovering from the
On Feb 17, 2011, at 1:21 PM, Konstantin Shvachko wrote:
hdfsproxy is a wrapper around hftpFileSystem (in its current state).
So you can always replace hdfsproxy with hftpFileSystem.
Also it uses pure FileSystem api, so it can successfully be maintained
outside of hdfs.
Therefore I am +1
On Feb 11, 2011, at 9:44 AM, Nigel Daley wrote:
On Feb 11, 2011, at 9:41 AM, Allen Wittenauer wrote:
On Feb 10, 2011, at 11:33 PM, Nigel Daley wrote:
Tom has created a public Jira filter for 0.22 blockers (thanks Tom!):
https://issues.apache.org/jira/secure/IssueNavigator.jspa?mode
On Feb 10, 2011, at 6:51 PM, Nigel Daley wrote:
I think the PMC should abandon the hod common contrib component. It's last
meaningful contribution was February 2009:
HADOOP-2898. Provide an option to specify a port range for Hadoop services
provisioned by HOD. Contributed by Peeyush
On Feb 9, 2011, at 9:18 AM, Nigel Daley wrote:
I think the PMC should abandon the failmon common contrib component. It's
last meaningful contribution was it's original commit in August of 2008:
Are there any patches in the patch queue?
When it comes to contrib, last commit
On Feb 7, 2011, at 1:06 PM, Doug Cutting wrote:
On 02/07/2011 12:37 PM, Chris Douglas wrote:
Is the implication that blog.hadoop.com would point there? -C
Sure, I'd be happy to redirect that CNAME. The other redirects for
hadoop.com already point to hadoop.apache.org. I grabbed the
On Oct 21, 2010, at 5:51 PM, Eli Collins wrote:
- The packaging is Linux specific, we've gotten push back when trying
to contribute modifications upstream with Linuxisms since Apache
supports non-Linux platforms (namely Solaris).
Oh come now Eli. Just say it: I push everyone really
On Oct 21, 2010, at 12:13 PM, Ian Holsman wrote:
Hi guys.
I wanted to start a conversation about how we could merge the the cloudera +
yahoo distribtutions of hadoop into our codebase,
and what would be required.
*grabs popcorn*
On Oct 21, 2010, at 2:53 PM, Ian Holsman wrote:
yep.. I've heard it's a source of contention...
Sure. Maybe like 8 months ago to anyone who was paying attention.
In discussing it with people, I've heard that a major issue (not the only
one i'm sure) is lack of resources to actually
On Sep 2, 2010, at 11:53 AM, Bob Li wrote:
Hi experts,
For hadoop 0.20.2, we have following task tracker configuration
property
namemapred.local.dir/name
value/data/mapred/local/value
/property
It seems not what I expected -- the directory /tmp/hadoop-user/mapred/local
was
On Aug 25, 2010, at 10:46 AM, Hemanth Yamijala wrote:
I do agree that this would be very useful for folks who want security
sooner. And the fact that Yahoo! have been running it at scale for a
good while now is also assuring.
As has been mentioned a few times, part of the security features
On Aug 23, 2010, at 3:19 PM, Owen O'Malley wrote:
Are there any concerns?
Just that 0.21 isn't even out of RC yet and that patches to fix it may get
missed.
On Jul 15, 2010, at 11:40 AM, Syed Wasti wrote:
Will it matter what the data block size is ?
Yes.
It is recommended to have a block size of 64 MB, but if we want to have the
data block size to 128 MB, should this effect the performance ?
Yes.
FWIW, we run with 128MB.
Does the size of
On Jul 9, 2010, at 2:09 AM, amit kumar verma wrote:
I think I got a solution. As I read more about hadoop and JNI, I learned that
I need to copy jni files to HADOOP_INSTALLATION_DIR//lib/native/Linux-xxx-xxx.
lib/native/xxx are for the native compression libraries. They are not for
On Jul 8, 2010, at 1:08 AM, amit kumar verma wrote:
DistributedCache.addCacheFile(hdfs://*
/192.168.0.153:50075*/libraries/mylib.so.1#mylib.so, conf);
Do you actually have asterisks in this? If so, that's the problem.
On Jul 5, 2010, at 5:01 PM, elton sky wrote:
Well, this sounds good when you have many small files, you concat() them
into a big one. I am talking about split a big file into blocks and copy all
a few blocks in parallel.
Basically, your point is that hadoop dfs -cp is relatively slow and
On Jun 29, 2010, at 8:07 AM, Sarah kho wrote:
Hi,
Can you please let me know what are tasks that the taskTracker and
JobTracker performs?
Pretty much the entirety of the MapReduce framework. You can think of it this
way:
HDFS -- MR
NameNode -- JobTracker
DataNode -- TaskTracker
Let me understand this:
a) the hbase folks have been required to patch hadoop due to bugs
b) they have been doing this for X months now
c) we finally have momentum on getting 0.21 out the door
d) hey, let's make their life easier and take resources out of 0.21 by creating
a branch
Are we
On May 10, 2010, at 10:18 AM, Stack wrote:
The above is a fallacious setup. How does a branch in 0.20 detract
from the 0.21 momentum (The append feature that we'd work on in 0.20
branch has little relation to how append works in 0.21).
There are X amount of hours that people can put into
On May 10, 2010, at 11:05 AM, Ryan Rawson wrote:
That's not how it works though - people have adopted and use Hadoop
0.20 because of the fact that people like Yahoo, Facebook, etc run it
on multi-thousand node clusters and have done so for months (or soon
to be years now).
If you look
On May 7, 2010, at 3:32 AM, Steve Loughran wrote:
Pierre ANCELOT wrote:
All my nodes are up, I can get the file through the DFS client...
0.20.2
OK, that's interesting. Try looking at the replication count and upping it,
or copying the file to make sure its all there.
Or running fsck
On Apr 13, 2010, at 9:24 AM, Arun C Murthy wrote:
I can no longer grant permission to Apache for my patches on JIRA. Anyone
else?
I haven't tried, but likely related to issues.apache.org getting compromised.
On Apr 10, 2010, at 7:33 AM, Mag Gam wrote:
What is the procedure to do this?
Change the topology script, bounce NN and JT.
is this possible to do while the
cluster is running?
No. There is a jira i filed on turning the cache into an actual cache w/TTLs,
etc.
I'm turning off my email today.
On 4/1/10 8:05 AM, Bill Abernathy billaberna...@ymail.com wrote:
I propose a vote to replace HBase as a Hadoop sub-project with Cassandra.
Why members should vote for this proposal:
* Twitter is using Cassandra
* Cassandra sounds like someone you'd
On 3/31/10 8:12 PM, Zhanlei Ma z...@vmware.com wrote:
But how to Recommission? Wish your help.
Take them out of dfs.exclude and refreshnodes again.
On 3/19/10 4:32 AM, Mag Gam magaw...@gmail.com wrote:
Thanks everyone. I think everyone can agree that this part of the
documentation is lacking for hadoop.
Can someone please provide be a use case, for example:
#server 1
Input script.sh
Output rack01
#server 2
Input script.sh
*nods*
There is a bug with the bitness detection in general (it breaks horribly on
Solaris due to the java executable supporting both). I've started working on
a general patch (it a] asks Java what bitness it is and b] asks java which
JVM lib to link against), but got sidetracked by switching
Seeing as how our two non-mainline distributions don't have real release
notes published, I've built two quick and dirty perl scripts (yes perl! Fear
the ops people!) to take the commit log from CDH and the Yahoo! changes
files to spit out Confluence-style wiki output. Changing it to other wiki
On 3/8/10 10:06 AM, Gary Yang garyya...@yahoo.com wrote:
Hi Owen,
Thanks for the reply. From the link you provided, I found the build
instruction. I do not understand the option, -Djava5.home=/usr/local/jdk1.5.
Does it mean I have to use JDK 1.5? I read somewhere it suggested to use JDK
On 3/4/10 7:24 AM, Stephen Watt sw...@us.ibm.com wrote:
I notice in 0.20.2 we now have a new jar in the lib called
mockito-all-1.8.0 (mockito.org states it is a Java Test mock-up
framework). In the interest of teaching this man to fish, in cases such as
this, how can I determine the reason
On 3/2/10 7:43 PM, Mag Gam magaw...@gmail.com wrote:
I have a 5 slave servers and I would like to be rackaware meaning each
server represents 1 rack resulting in 5 racks. I have looked around
for examples online but could not find anything concrete. Can someone
please show me an example on
On 3/3/10 4:11 AM, Mag Gam magaw...@gmail.com wrote:
An example would be very helpful. There is only 1 paragraph about this
but its far too important not to have an example or two.
I covered this in my preso to apachecon last year:
On 2/28/10 11:48 PM, Terrence Martin tmar...@physics.ucsd.edu wrote:
Mag Gam wrote:
I just setup my first hadoop cluster with 5 nodes. What is the best
way to check if replication is really working? I assume the best way
is to power down 2 nodes and see if I can still reach my data?
Well
Marc,
You might find my preso I did on Hadoop at Apachecon EU last year handy:
http://wiki.apache.org/hadoop/HadoopPresentations?action=AttachFiledo=view;
target=aw-apachecon-eu-2009.pdf
aka
http://bit.ly/d3UU4A
It talks a bit about the care and feeding of your Hadoop grid, including how
to
On 2/18/10 11:29 AM, Doug Cutting cutt...@apache.org wrote:
Eli Collins wrote:
What are the current plans for the 21 release?
Personally, I'd rather re-branch 21 from trunk in early March. I
believe Y!'s security changes will be feature-complete in trunk by then.
Symlinks and
On 2/11/10 9:00 AM, Owen O'Malley omal...@apache.org wrote:
These same problems are present as seen in the branch-20 Hudson build:
http://hudson.zones.apache.org/hudson/job/Hadoop-20-Build/67/console
The problem on Hudson seems to be that automake 1.9 is not installed.
That seems like a
On 1/24/10 10:33 PM, Naveen Kumar Prasad naveenkum...@huawei.com wrote:
If many jobs are running concurrently in Hadoop, how can we set CPU usage
for individual tasks.
That functionality does not exist.
On 1/5/10 11:29 AM, Todd Lipcon t...@cloudera.com wrote:
1) Although we certainly do not guarantee wire compatibility between minor
versions (0.20 - 0.21) have we previously implied wire compatibility
between bugfix releases?
IIRC, it has been implied and was a goal but not officially written
On 12/1/09 10:37 AM, ben.cot...@lehman.com benjamin.cot...@lehman.com
wrote:
How do I configure Hadoop ACLs to specify a uid's read/write/execute
privileges?
If I parse your question correctly, you want to limit certain uids to have
only be able to read or write certain data? That
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