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From "offbynull (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCORE-368) Smarter use of buffers in SSLIOSession
Date Wed, 18 Dec 2013 19:13:07 GMT

    [ https://issues.apache.org/jira/browse/HTTPCORE-368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13852041#comment-13852041

offbynull commented on HTTPCORE-368:

Something I just noticed: A hasData() check could be added in to sendEncryptedData() to make
sure that there's data available to be sent out. If there's nothing in the buffer, there's
no point in acquiring and trying to send the buffer.

    private int sendEncryptedData() throws IOException {
        if (!this.outEncrypted.hasData()) {
            return 0;

        // Acquire buffer
        ByteBuffer outEncryptedBuf = this.outEncrypted.acquire();

        // Perform operation
        final int bytesWritten = this.session.channel().write(outEncryptedBuf);

        // Release if empty
        if (outEncryptedBuf.position() == 0) {
            outEncryptedBuf = null;

        return bytesWritten;

The only problem I see with this is that there may be a dependency somewhere up the call chain
on the exceptions that write() throws back (e.g. if the connection's been closed / interrupted
/ whatever).

> Smarter use of buffers in SSLIOSession
> --------------------------------------
>                 Key: HTTPCORE-368
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-368
>             Project: HttpComponents HttpCore
>          Issue Type: Improvement
>          Components: HttpCore NIO
>    Affects Versions: 4.3
>            Reporter: offbynull
>              Labels: patch
>             Fix For: 4.4
>         Attachments: SSLIOSession.patch, SSLIOSession3.patch, SSLIOSession4.patch
> We're using the async client to load test our comet infrastructure. We're frequently
running in to OutOfMemoryErrors due to the ByteBuffers allocated in SSLIOSession.
> The following is a quick-and-dirty patch to SSLIOSession that removes the buffers when
they aren't needed. Could we get this (or something similar to this) added in to httpcore-nio?

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