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Technical Bulletins
Technical bulletins alert the reader to potential software and hardware problems. The bulletins usually include simple fixes and/or work-arounds. This list displays a summary of the bulletins. Select a highlighted link to obtain the full bulletin text and any associated supplemental files.
Date Description/link Summary
2007-11-26 Configure NIS/YP on cluster toolbox diskless back-end nodes. How to configure NIS/YP on cluster toolbox diskless back-end nodes
2005-09-24 Slow ssh authentication on Debian systems. SSH commands function, but are slow to connect on Debian clusters.
2005-06-26 DNS lookup causes ssh to take a long time to connect. ssh takes a long time to connect.
2004-06-24 ssh uses fake authentication data for X11 forwarding. When ssh is unable to get Xauthority information for the display, it makes up some fake authentication data and prints a warning.
2004-06-22 Set the verbosity level of ssh to quiet when logging messages. Suppress all warning and diagnostic messages of ssh client of OpenSSH.
2003-08-19 Enable environment processing by sshd on a cluster. Environment processing is disabled by default and is controlled via the PermitUserEnvironment option. N.B. Enabling environment processing may enable users to bypass access restrictions in some configurations.
2003-05-05 Mistakenly redefines __bswap_16 instead of __bswap_32 in /usr/include/bits/byteswap.h This a fix that allows to install MPICH and LAM/MPI using Intel Compilers.
2002-10-28 Nodes use UTC time Rocketcalc clusters present the time using coordinated universal time (UTC).
2002-09-20 Unable to mount NFS mountpoints after node ip addess change. Nodes are unable to mount NFS mountpoints from the front-end PC after their IP addresses have been changed.
2002-08-05 Managing bash environment settings. This bulletin describes how to set up login files to manage bash environment settings.
2002-07-31 Houston/Configure tool does not update settings Settings may not be updated from the Houston/Configuration tool window after the window is closed.
2002-07-30 Certain NFS-exported files become unreadable by the cluster nodes. Hard-linked files on the front-end PC, and possibly other types of files, that are exported by the front-end PC to the nodes using NFS can become unreadable by the cluster nodes. This can cause many applications to fail to run on the cluster, often resulting in "Stale NFS File Handle" errors.
2002-07-28 Houston window can get resized too small to see. Houston may not appear to start if its window gets resized too small. In fact, Houston has started but the window is not noticeable.
2002-07-20 Houston keeps detecting new clusters. Houston automatically identifies a new cluster, but the changes are not saved and the cluster hardware is not updated. Houston may then continue to pop-up windows identifying the cluster, leading to multiple copies of it in the configuration tool window.
2002-07-14 SSH does not work without passwords. The version of SSH installed by default by many Linux distributions including RedHat 7.x are configured to always require passwords.
2002-07-14 Permissions not set correctly for /var/tmp. The /var/tmp directory does not have the correct permissions.
2002-07-12 Motor ext3 file system becomes read-only. Motor ext3 file system becomes read-only. The ext3 file system used on the flash storage device on some clusters can become read-only due to a problem updating the journal. Read this bulletin for instructions to convert the systems back to the default ext2 file system. The ext2 file system will not exhibit this problem.

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