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copied!<blockquote> <ul> <li><p>Some platforms may have broken sendfile support that the build system did not detect, especially if the binaries were built on another box and moved to such a machine with broken sendfile support.</p></li> <li><p>On Linux the use of sendfile triggers TCP-checksum offloading bugs on certain networking cards when using IPv6.</p></li> <li><p>With a network-mounted directories (e.g. NFS or SMB), the kernel may be unable to serve the network file through its own cache.</p></li> </ul> </blockquote> <p>Add <code>useSendfile="false"</code> to the Tomcat connector in <code>server.xml</code></p> <pre><code><Connector ... useSendfile="false" /> </code></pre> <p>Other configurations to check</p> <ol> <li><p>Decent memory allocation and timeouts </p> <pre><code>JAVA_OPTS="-server -Xms256m -Xmx1024m -XX:MaxPermSize=128m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000" </code></pre></li> <li><p>Tomcat Connector options</p></li> </ol> <blockquote> <p><strong>maxPostSize</strong> (104857600 == 100 megabytes, default= 2 megabytes)</p> <p>The maximum size in bytes of the POST which will be handled by the container FORM URL parameter parsing. The feature can be disabled by setting this attribute to a value less than or equal to 0. If not specified, this attribute is set to 2097152 (2 megabytes). Two other configurations to check is the timeout limit and the maxFileSizeLimit</p> <p><strong>disableUploadTimeout</strong> (make sure its not set to false)</p> <p>This flag allows the servlet container to use a different, longer connection timeout while a servlet is being executed, which in the end allows either the servlet a longer amount of time to complete its execution, or a longer timeout during data upload. If not specified, this attribute is set to "true".</p> <p><strong>maxHttpHeaderSize</strong> (try to double it)</p> <p>The maximum size of the request and response HTTP header, specified in bytes. If not specified, this attribute is set to 4096 (4 KB)</p> </blockquote>

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