Fred Bricon created MNG-6053:
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Summary: Unsafe System Properties copy in
MavenRepositorySystemUtils, causing NPEs
Key: MNG-6053
URL: https://issues.apache.org/jira/browse/MNG-6053
Project: Maven
Issue Type: Bug
Affects Versions: 3.3.9
Environment: Eclipse m2e 1.7
Reporter: Fred Bricon
This bug has been reported in m2e
https://bugs.eclipse.org/bugs/show_bug.cgi?id=493871:
{quote}
I'm occasionally, not 100% reliably reproducible, but regularly enough (like it
occurs every now and then, not just once) seeing the error below, in the Error
Log of Eclipse during workspace rebuilds. This is with M2E 1.7.0. -- I'm not
sure if this is just "annoying" or actually prevents M2E from correctly
configuring projects (?). Either way, perhaps it would be possible to "harden"
respective code to prevent this?
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:459)
at
org.apache.maven.repository.internal.MavenRepositorySystemUtils.newSession(MavenRepositorySystemUtils.java:133)
at
org.apache.maven.internal.aether.DefaultRepositorySystemSessionFactory.newRepositorySession(DefaultRepositorySystemSessionFactory.java:98)
at
org.apache.maven.DefaultMaven.newRepositorySession(DefaultMaven.java:352)
at
org.eclipse.m2e.core.internal.embedder.MavenImpl.createRepositorySession(MavenImpl.java:309)
{quote}
Looking at
https://github.com/apache/maven/blob/86b656167923923e2e416def4a48303b4e6248fa/maven-aether-provider/src/main/java/org/apache/maven/repository/internal/MavenRepositorySystemUtils.java#L132,
it seems some system property is null (maybe due to some concurrency issue),
and given that Hashtable doesn't support null values, then it throws an NPE on
the put() call
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