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POMemory leak with Perl's LWP using HTTPS
 

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  1. POMemory leak with Perl's LWP using HTTPS
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    <p>I think I found a memory leak with LWP when connecting via HTTPS. With the following script, memory usage increases constantly:</p> <pre><code>use LWP::UserAgent; $ua = LWP::UserAgent-&gt;new(); $request = HTTP::Request-&gt;new(GET=&gt;'https://www.google.com/'); while (1) { $response = $ua-&gt;request($request); sleep(1); } </code></pre> <p>This other script has no problems:</p> <pre><code>use LWP::UserAgent; $ua = LWP::UserAgent-&gt;new(); $request = HTTP::Request-&gt;new(GET=&gt;'http://www.google.com/'); # https =&gt; http while (1) { $response = $ua-&gt;request($request); sleep(1); } </code></pre> <p>Perl 5.12.3 / LWP 5.837 / Crypt::SSLeay 0.58 / Mac OS X 10.7.4</p> <p>Does anyone know a way around this?</p> <p><hr> <strong>UPDATE</strong></p> <p>Perl 5.12.4 / LWP 6.05 / Crypt::SSLeay 0.64 / Mac OS X 10.8.4</p> <p>The memory leak still exists when connecting through HTTPS. To try it out, run the sample script on the terminal, and see the memory grow and grow with the Activity Monitor.</p> <p><hr> <strong>UPDATE</strong></p> <p>After some testing I found out that, with the recent upgrade of my libraries, there is still a memory leak, but <strong>it only happens when you call certain addresses</strong> over HTTPS. In the above example I was calling <a href="https://www.google.com" rel="nofollow">https://www.google.com</a>, and it happens to be one of those addresses. For instance, this code gives me no memory leaks:</p> <pre><code>use LWP::UserAgent; $ua = LWP::UserAgent-&gt;new(); $request = HTTP::Request-&gt;new(GET=&gt;'https://twitter.com/'); # www.google.com =&gt; twitter.com while (1) { $response = $ua-&gt;request($request); sleep(1); } </code></pre> <p><hr> <strong>UPDATE</strong></p> <p>I reported the bug and some other people have confirmed my findings: <a href="https://rt.cpan.org/Ticket/Display.html?id=88287" rel="nofollow">https://rt.cpan.org/Ticket/Display.html?id=88287</a></p>
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    1. COVersion or Perl/LWP/Crypt::SSLeay? Platform?
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    2. COAre you expecting the size of your program to shrink? On Unix, they don't do that. The high water mark just rises, and as memory is freed, it is kept in the pool for the program to reuse, but they never shrink themselves.
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    3. COI just added the version numbers. No, I'm not expecting it to shrink, but this script is some kind of a bot, and after just a couple of days running, the script was already using 500 Mb.
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