问题
Bug https://issues.apache.org/jira/browse/MDEPLOY-177 has been hitting me for many month. When maven tries to download artifacts it will stall with a message saying it is downloading
x+1 of x B
e.g.
1007/1006 B
and then it hangs. Robert Scholte tried to help on this quite a few times but so far to no avail. In my multiplatform environment I every once in a while see the bug creeping up be it in an Eclipse environment or directly on Mac OSX macports or just recently with Ubuntu 14.04 LTS.
How could i get rid of this problem for good?
These are suggestions I know of so far:
- to replace the wagon version
- to use wagon-ssh directly
- to use a more current mvn version in the first place.
- select a different wagon-provider
For each of these I do not have a clue how to do these things.
**for #1: replace the wagon version **
E.g. Robert Scholte wrote: "Wolfgang Fahl, could you narrow it down to the version of the ssh-wagon since when this issue starts? You can do it by downloading that jar and put it in apache-maven-3.2.3/lib/ext"
But where would that location be in e.g. Eclipse / MacPorts / Ubuntu?
This is what I have on the Ubuntu 14.04 LTS machine:
muf@capri:/usr/share/maven/lib$ ls -l | grep wagon
lrwxrwxrwx 1 root root 37 Oct 30 2013 aether-connector-wagon.jar -> ../../java/aether-connector-wagon.jar
lrwxrwxrwx 1 root root 29 Oct 30 2013 wagon-file.jar -> ../../java/wagon-file-2.x.jar
lrwxrwxrwx 1 root root 36 Oct 30 2013 wagon-http-shaded.jar -> ../../java/wagon-http-shaded-2.x.jar
lrwxrwxrwx 1 root root 37 Oct 30 2013 wagon-provider-api.jar -> ../../java/wagon-provider-api-2.x.jar
in /usr/share/java there are:
muf@capri:/usr/share/java$ ls -l wagon-ssh*
lrwxrwxrwx 1 root root 13 Apr 24 2012 wagon-ssh-1.0.jar -> wagon-ssh.jar
lrwxrwxrwx 1 root root 17 Nov 1 2013 wagon-ssh-2.x-2.5.jar -> wagon-ssh-2.x.jar
-rw-r--r-- 1 root root 24033 Nov 1 2013 wagon-ssh-2.x.jar
lrwxrwxrwx 1 root root 20 Apr 24 2012 wagon-ssh-common-1.0.jar -> wagon-ssh-common.jar
lrwxrwxrwx 1 root root 24 Nov 1 2013 wagon-ssh-common-2.x-2.5.jar -> wagon-ssh-common-2.x.jar
-rw-r--r-- 1 root root 20532 Nov 1 2013 wagon-ssh-common-2.x.jar
-rw-r--r-- 1 root root 21913 Apr 24 2012 wagon-ssh-common.jar
lrwxrwxrwx 1 root root 25 Apr 24 2012 wagon-ssh-common-test-1.0.jar -> wagon-ssh-common-test.jar
-rw-r--r-- 1 root root 6131 Apr 24 2012 wagon-ssh-common-test.jar
lrwxrwxrwx 1 root root 22 Apr 24 2012 wagon-ssh-external-1.0.jar -> wagon-ssh-external.jar
lrwxrwxrwx 1 root root 26 Nov 1 2013 wagon-ssh-external-2.x-2.5.jar -> wagon-ssh-external-2.x.jar
-rw-r--r-- 1 root root 9953 Nov 1 2013 wagon-ssh-external-2.x.jar
-rw-r--r-- 1 root root 9718 Apr 24 2012 wagon-ssh-external.jar
-rw-r--r-- 1 root root 23603 Apr 24 2012 wagon-ssh.jar
for #2: I didn't find instructions for this so far.
for #3:
For the obvious "more current mvn" I'd have to know which maven ships with a wagon that does not have the bug any more. Up to 3.3.1 the bug was there e.g. on Mac OS X.
for #4: https://maven.apache.org/guides/mini/guide-wagon-providers.html has instructions on changing the provider - it does not say how you change the version of a provider
So far downgrading to mvn 3.0.5 had worked. But unfortunately in Ubuntu 14.04 LTS that is just the version that e.g. works on Macports - but there it does not!
回答1:
specifying wagon-ssh 2.10 in the master pom.xml fixes the issue. 2.7 was broken 2.9 might be broken.
<extensions>
<extension>
<groupId>org.apache.maven.wagon</groupId>
<artifactId>wagon-ssh</artifactId>
<version>2.10</version>
</extension>
</extensions>
</build>
来源：https://stackoverflow.com/questions/33318793/how-to-fix-or-workaround-wagon-bug