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Bug 366382

Summary:	during update redownload of identical packages
Product:	[Eclipse Project] Equinox	Reporter:	Michael Woski <woskimi>
Component:	p2	Assignee:	P2 Inbox <equinox.p2-inbox>
Status:	RESOLVED WORKSFORME	QA Contact:
Severity:	normal
Priority:	P3	CC:	irbull, pascal
Version:	3.8.0 Juno
Target Milestone:	---
Hardware:	PC
OS:	Linux
Whiteboard:

Description Michael Woski

2011-12-12 06:53:17 EST

I have been wondering why sometimes updateing my eclipse installation takes so long. I've found out that often packages are getting downloaded multiple times. In the plugin directory I can observe the files being streamed to and eventually being overwritten again. This goes on and on until at some point the whole thing succeeds.
It is not an issue of the latest builds, because this is bothering me for a long long time now.
Maybe it's also important to note that I have a whole bunch of update sites configured.
Are there any options to further explore this behaviour?

Comment 1 DJ Houghton

2011-12-16 11:17:18 EST

JARs should not be re-downloaded if everything is the same. Is this a problem with the JARs included in the SDK or only your extra bundles? Are you able to construct a simple test case that you can attach here for viewing?

Comment 2 Michael Woski

2011-12-16 12:25:36 EST

(In reply to comment #1)
Again, this happens when updates are available (About -> Installation Details -> Installed Software -> Update), so I don't think that the question whether packages have changed is the issue here.
Unfortunately I can't construct a test case because what I do is, I simply try to update my workbench from public p2 repos.
Last time, for instance, I observed it with ...emf.doc.pack.gz (don't remember the exact name though) and also with a couple m2eclipse packages.
As soon as the package in concern finishes downloading, the same package get's downloaded again, and again, and .... until eventually the installation process proceeds. Of course mostly I see it on large packages, but this is certainly only due to my slow perception ... In addition to the Progress View, one can inspect the plugin folder where the files are being streamed to; after apparent completion suddenly (with a short delay though) the file has 0 size again.
I don't know what really triggers this, because most packages download just fine.

Comment 3 DJ Houghton

2011-12-16 13:41:25 EST

What version of Eclipse are you using? This sounds similar to bug 340165 and bug 327256 but both of those should be fixed in Eclipse 3.7. Do you still have the same problem if you turn off mirror by setting the system property?  (eclipse.p2.mirrors=false)

Comment 4 Michael Woski

2011-12-17 14:04:59 EST

(In reply to comment #3)
> What version of Eclipse are you using? This sounds similar to bug 340165 and
> bug 327256 but both of those should be fixed in Eclipse 3.7. Do you still have
> the same problem if you turn off mirror by setting the system property? 
> (eclipse.p2.mirrors=false)

indeed it sounds exactly like my problem. I will try with the system property set, but this might take some time to confirm. Btw. I use 3.8 milestone build.

Comment 5 Michael Woski

2012-02-03 08:34:20 EST

I guess the config setting has solved it for me. I am no longer seeing duplicate downloads.

Comment 6 Ian Bull

2012-02-14 12:46:52 EST

Can I close this bug then?

Comment 7 Michael Woski

2012-02-15 03:14:40 EST

(In reply to comment #6)
> Can I close this bug then?

From my point of view, I can live with it.

Comment 8 Pascal Rapicault

2014-04-07 15:35:59 EDT

closing as per user's last comment.