Java: Repeated calls to connect() leak memory

[pstadermann]

Steps to reproduce

• Run this test

    @Test
    public void connect_RepeatedlyCalled_DoesntLeakMemory() throws Exception {
        var sha256 = new Sha256("ab5788279033b0a96f2d342e5f35159f103f69e0191dd391e036a1cd711791a2");

        while (true) {
            vaas.connect();
            var verdict = vaas.forSha256(sha256);

            assertEquals(Verdict.MALICIOUS, verdict.getVerdict());
        }
    }

• Check the memory usage (e.g. with htop)
• Wait 5min
• Check again

Expected

Memory usage does not increase over time (except some GC fluctuations).

Actual

Memory use increase by 1MB per second.