<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><head></head><div></div><div><br><div><div>Begin forwarded message:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>From: </b></span><span style="font-family:'Helvetica'; font-size:medium;">Jiri Lunacek <<a href="mailto:jiri.lunacek@hosting90.cz">jiri.lunacek@hosting90.cz</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>Date: </b></span><span style="font-family:'Helvetica'; font-size:medium;">14. června 2011 15:32:22 GMT+02:00<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>To: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><a href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>Subject: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><b>[Gluster-users] Fwd: Apache hung tasks still occur with glusterfs 3.2.1</b><br></span></div><br><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I am back with the results.<div><br></div><div><div>Glusterdump is attached to this e-mail.</div><div><br></div><div>I found a way of reproducing this issue, I just ran:</div><div><br></div><div>for i in {1..1000}; do echo "<a href="http://server.address.com/file/hosted/from/gluster.jpg">http://server.address.com/file/hosted/from/gluster.jpg</a>"; done | xargs -L1 -P20 wget -O/dev/null</div><div><br></div><div>i.e. multiple synchronous requests on an individual file through apache.</div><div><br></div><div>With io-cache enabled this caused over 70 apache processes to hang in sync_page ioctl.<br><div><br></div><div><div>Glusterdump is attached to this e-mail.</div></div><div><br></div><div>I have the server back with the work-around parameters. I am hoping that the dump will help you guys isolate the bug.</div><div><br></div><div>Jiri</div><div></div></div></div></div></blockquote></div></div></body></html>