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Mahadev konar commented on ZOOKEEPER-29:
flavio,
can you elaborate on what else
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Flavio Paiva Junqueira commented on ZOOKEEPER-29:
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Thanks for you comment
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Hadoop QA commented on ZOOKEEPER-355:
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+1 overall. Here are the results of testing
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Patrick Hunt commented on ZOOKEEPER-78:
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running doxygen-doc doesn't result in any
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Patrick Hunt commented on ZOOKEEPER-78:
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comments on the c code:
the api methods a
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Patrick Hunt commented on ZOOKEEPER-369:
It would be great if we could ping the
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Patrick Hunt commented on ZOOKEEPER-78:
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These comments are relative to the java co
I'm curious about your session scenario. If your servers can hang for X seconds
without a problem and Y is your session timeout, why would you set Y < X? In
your case if you set your session timeout to 5 secs for example, but your
server can hang for 20 seconds doing GC, your clients cannot expe
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Mahadev konar updated ZOOKEEPER-347:
Resolution: Fixed
Hadoop Flags: [Reviewed]
Status: Resolved (was: Patch
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Stu Hood commented on ZOOKEEPER-29:
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Two comments:
This ticket seems to overlap
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Mahadev konar updated ZOOKEEPER-370:
Resolution: Fixed
Hadoop Flags: [Reviewed]
Status: Resolved (was: Patch
I see what you are saying, that's interesting. As Mahadev mentioned on
another thread, we'd be interested to look at the JNI you've done.
Perhaps we will need to include this as an option (and document where
it's necessary, etc...) for other users who might run into this.
Thanks much for bring
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Flavio Paiva Junqueira commented on ZOOKEEPER-370:
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These are just smal
Nitay is correct about the native threads. Using the pure Java API,
the garbage collector will occasionally pause other Java threads to do
a full mark and sweep. Even switching to the concurrent collector only
delays the problem. The issues is mixing a high throughput application
(HBase) with a low
Nitay,
Thanks for sending us the info.
We have experienced such gc problem in our HDFS (hadoop file system) setups.
The gc had been quite a problem for us with the Namenode (hadoop hdfs)
process. We have seen the namenode just stalling for minutes doing garbage
collection. We currently run the nam
The default session timeout in HBase is currently 10 seconds. Bumping it up
to 30 and 60 reduced SessionExpired exceptions, according to Andrew. I
believe Andrew did run it under jconsole. He was also tuning GC parameters.
He mentioned running using incremental garbage collector
(-XX:+UseConcMarkSw
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Flavio Paiva Junqueira commented on ZOOKEEPER-29:
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Mahadev, I'm ok with m
This is good to know. It will allow us to try an replicate the
situation, which we haven't been able to do.
I'm hoping we can come up with something that we can proactively do to
address this...
Patrick
Nitay wrote:
Also, I should mention that some of the errors Andrew was seeing are relate
What are you running for a session timeout on your clients?
Can you run with something like jvisualvm or jconsole, and watch the gc
activity when the session timeouts occur? Might give you some insight.
Have you tried one of the alternative GC's available in the VM?
http://developer.amd.com/doc
Also, I should mention that some of the errors Andrew was seeing are related
to ZOOKEEPER-344:
I see this kind of stuff:
2009-04-07 17:58:13,344 - WARN [NIOServerCxn.Factory:2181:
nioserverc...@417] - Exception
causing close of session 0x2208296c38e due to
java.io.IOException: Read error
a
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Hadoop QA commented on ZOOKEEPER-370:
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-1 overall. Here are the results of testing
Hey guys,
We've recently replaced a few pieces of HBase's cluster management and
coordination with ZooKeeper. One of guys, Andrew Purtell, has a cluster that
he throws a lot of load at. Andrew's cluster was getting a lot of
SessionExpired events which were causing some havoc. After some discussion
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Mahadev konar updated ZOOKEEPER-78:
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Attachment: ZOOKEEPER-78.patch
i attached header files to package.html
makefile.am
configur
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Patrick Hunt commented on ZOOKEEPER-78:
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This first set of comments is relative to
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Mahadev konar commented on ZOOKEEPER-29:
flavio,
i just took a cursory look at th
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Flavio Paiva Junqueira updated ZOOKEEPER-29:
Attachment: ZOOKEEPER-29.patch
This new patch is partially functional. Fa
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Patrick Hunt commented on ZOOKEEPER-347:
this fixes a C code gcc compiler warnin
to implement jdiff
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Key: ZOOKEEPER-371
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-371
Project: Zookeeper
Issue Type: Improvement
Components: build
Affects Versions: 3.2.0
Environment: to i
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Hadoop QA commented on ZOOKEEPER-78:
-1 overall. Here are the results of testing the
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Flavio Paiva Junqueira updated ZOOKEEPER-370:
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Status: Patch Available (was: Open)
> Fix critical problems reported
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Flavio Paiva Junqueira updated ZOOKEEPER-370:
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Status: Open (was: Patch Available)
There is no hudson report after M
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Hadoop QA commented on ZOOKEEPER-347:
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-1 overall. Here are the results of testing
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