Little memory leak detected

Perhaps some duplicate of MRM-1741 (but no activity since 6 months => openend a new)

We are using Archiva 1.4-M4 for our company, and we found some memory problem usage on this version.

It seems not to be a "big problem", because there is not directly a OutOfMemory, the Jetty server becomes very slow before. Symptom from CI platorm (for exemple) :

Server returned HTTP response code: 502 for URL: http://[url]/repository/[repoName]/[grouId]/[artifactId]/[version]/maven-metadata.xml

Informations about volumetry :

Requests by day (wc -l request-XXX.log) : 430000 (average)

Company repositories (Total File Count from Stats in Repositories menu) :

• company-releases : 574771
• company-snapshots : 118905
• proxied-releases : 232626
• proxied-snapshots : 2136
• extra-libs : 9232
• commercial-libs : 4587
• Total : 950000

Note : Option "Skip Packed Index creation" activated on each repositories.

Analysis :

The GC grow up during the week :

The invocation to GC grow up when memory is short :

Before the problem, we can see the impact (difficulty to garbage memory) :

After a application restart, the common usage is less than 2Go :

=> So the supposition is a little memory leak.

A solution could be some cache time reduction or SoftReference/WeakReference usage.

Today I have not more information about problem, restart was urgent, and analysis a 4Go HeapDump a little difficult.
I will take HeapDumps the next week to give some detail about memory usage.