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Re: [m2e-users] m2e update dependencies much slower than mvn -U

What version of nexus do you use? Is it hosted or proxy repository?

--
Regards,
Igor

On 2013-07-30 11:23 AM, Paull M wrote:
example of what ? my project, my configuration, my network layout ? i'll
try to make huge project with a lot of dependencies ...
nexus repository is close to me (on the local network). And
request/response itself takes 100-300 ms (from mvn command line and m2e
as well). Not sure that i know how to measure connection establishment
time, but it also should be a little.



On Tue, Jul 30, 2013 at 9:43 AM, Igor Fedorenko <igor@xxxxxxxxxxxxxx
<mailto:igor@xxxxxxxxxxxxxx>> wrote:

    Can you provide a standalone example that demonstrates the problem?

    How "far" is your snapshot repository from your build machine in terms
    of request/response roundtrip time? Do you know how long it takes to
    establish connection to the repository? I am pretty sure m2e performs
    artifacts resolution serially and I think it does not use persistent
    http sessions either. Command line maven, on the other hand, uses
    persistent http sessions and executes multiple artifact download
    requests in parallel, which should result in much better performance in
    high-latency scenarios.

    --
    Regards,
    Igor


On 2013-07-30 9:42 AM, Paull M wrote:

        I've checked with Eclipse TCP/IP monitor: both m2e and mvn
        command line
        makes approximately the same number of requests. With mvn
        command line
        they are performing incessantly, without gaps. M2e performs requests
        with pauses: it makes several requests, than about one second sleep,
        then again number of requests. And those pauses makes this total
        difference.
        I'm trying to debug what causes those pauses: netty/aether or
        some logic
        between requests - but without any luck...


On Tue, Jul 30, 2013 at 12:16 AM, Igor Fedorenko <igor@xxxxxxxxxxxxxx <mailto:igor@xxxxxxxxxxxxxx> <mailto:igor@xxxxxxxxxxxxxx <mailto:igor@xxxxxxxxxxxxxx>>> wrote:

             This most likely will require changes to m2e code, but I
        don't know what
             causes the problem and can't suggest a possible fix. Can
        you identify
             what m2e does differently compared to command line maven,
        for example,
             does it run unnecessary/redundant remote requests during
        snapshot
             resolution?

             --
             Regards,
             Igor


On 2013-07-29 11:34 PM, Paull M wrote:

                 Hi,
                 I have a project with a lot of snapshot dependencies
        (about 50)
                 and all
                 of the are published in local nexus repository. When
        I'm building
                 project with 'maven compile -U' it takes about one
        minute. But
                 when I'm
                 using m2e Maven->Update project->Update snapshots it
        takes 5~10
                 minutes.
                 It reproducible on different versions of eclipse (
        3.7,3.8,4.3)
                 and m3e
                 (1.4,1.5).
                 Any ideas ?
                 As I see m2e uses different way to update dependencies
        as maven
                 itself.
                 Netty and aether may be i need to tweak them ?

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