<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hello,<div class=""><br class=""></div><div class="">I just added a new brick and then rebalanced. After I did that, I had some strange behavior on our cluster.</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">I was using a python script that did this on some nodes. </div><div class=""><br class=""></div><div class=""><font face="Courier" class="">import matplotlib</font></div><div class=""><font face="Courier" class="">…</font></div><div class=""><font face="Courier" class="">ImportError:libpng16.so.16: cannot open shared object file: No such file or directory</font></div><div class=""><font face="Courier" class=""><br class=""></font></div><div class=""><font face="Courier" class=""><br class=""></font></div><div class="">Which is weird because I listed it on the master node and it was there. I then logged in directly to each node that was “missing” the file and sure enough I got the same error. However, after I did:</div><div class=""><br class=""></div><div class=""><font face="Courier" class="">$ls -l /mypython/lib/path/libpng16.so.16</font></div><div class=""><font face="Courier" class="">/mypython/lib/path/libpng16.so.16 -> libpng16.so.16.22.0</font></div><div class=""><br class=""></div><div class="">I tried this script again and it worked! So this issue was just resolved by ls’ing the “missing” file. Is there a glusterfs explanation for this? Why is the file “missing” until I ask the shell to ls the file. These nodes just mount my volume using mount -t glusterfs mymainnode:/brick, nothing too weird.</div><div class=""><br class=""></div><div class="">Jordan</div></body></html>