This is an outdated version of the HTCondor Manual. You can find current documentation at http://htcondor.org/manual.

11.6 Stable Release Series 8.4

This is a stable release series of HTCondor. As usual, only bug fixes (and potentially, ports to new platforms) will be provided in future 8.4.x releases. New features will be added in the 8.5.x development series.

The details of each version are described below.

Version 8.4.12

Release Notes:

• HTCondor version 8.4.12 released on July 13, 2017.

New Features:

• Added a new knob, STARTD_RECOMPUTE_DISK_FREE, which defaults to true, which tells the condor_startd to periodically recompute and advertise free disk space. Administrators can set this to false for partitionable slots whose execute directory is used by HTCondor alone. (Ticket #6301).

Bugs Fixed:

• None.

Version 8.4.11

Release Notes:

• HTCondor version 8.4.11 released on January 23, 2017.

New Features:

• Added a new config knob, IGNORE_LEAF_OOM, which defaults to False. When True, it tells HTCondor not to kill and hold a job that is within its memory allocation, even if other processes within the same cgroup have exceeded theirs. (Ticket #5775).

Bugs Fixed:

• Fixed a bug where the effects of a startd cron job would not be used by the condor_startd when making policy decisions (e.g., evaluating the START expression) until an UPDATE_INTERVAL had passed. This was generally only noticeable if you set STARTD_CRON_AUTOPUBLISH to a value other than NEVER, which could cause the startd to reject claims from the negotiator that had been made based on the cron-updated value(s). (Ticket #6057).

• Fixed a bug in pslot preemption where it could cause matching jobs to not start for a long time. (Ticket #6055).

• Fixed a bug that caused a job to not be cleaned up when the job lease expires, if glexec is in use. (Ticket #6058).

• Fixed a problem, found while testing on Ubuntu 16, where the negotiator would crash at the end of the negotiation cycle. (Ticket #6064).

• Updated the default configuration in the Debian and Ubuntu packages to look for the Ganglia shared libraries in the proper place. (Ticket #5939).

• Updated the Enterprise Linux 7 RPM to require the proper SELinux utilities for its post-install script. (Ticket #6081).

Version 8.4.10

Release Notes:

• HTCondor version 8.4.10 released on December 13, 2016.

New Features:

• None.

Bugs Fixed:

• Added additional SELinux type enforcement rules on Enterprise Linux 7 for the condor_shared_port daemon and Linux tuning script. The RPM post install script makes the HTCondor SELinux domains permissive. (Ticket #5449). (Ticket #5560). (Ticket #5835).

• Fixed a performance problem in the condor_schedd when RequestCpus was an expression. Added a new parameter SCHEDD_SLOT_WEIGHT, which may be needed if SLOT_WEIGHT is not the default value of "Cpus", and refers to expressions in the job ad. (Ticket #5996).

• When transferring a job's sandbox, the permissions on sub-directories are now preserved in the same that they are for regular files. Previously, the permissions were modified by HTCondor daemon's umask, and directories transferred from a Windows machine to a UNIX machine had no permissions enabled. (Ticket #5948).

• Fixed bug in the HOLD_IF_CPUS_EXCEEDED configuration template metaknob. (Ticket #5933).

• Fixed a bug in the LIMIT_JOB_RUNTIMES configuration template metaknob so that it works in the face of a non-default MaxJobRuntime. (Ticket #5961).

• Fixed a bug that made it so a restart of the condor_schedd was required in order to change REMOVE_SIGNIFICANT_ATTRIBUTES to remove an attribute that the condor_schedds had already marked as significant. (Ticket #5983).

• When creating a Google Compute Engine instance, instruct the server to delete the auto-created disk image when the instance is removed. (Ticket #5999).

• Fixed a bug in our support for Google Compute Engine which would cause authorization tokens to be renewed five minutes after the deadline instead of five minutes before. Naturally, this led to ten minutes of interrupted service for jobs (or workloads) which lasted longer than the initial valid duration of the tokens. (Ticket #6009).

• Fixed a bug that would cause the condor_schedd to crash when a condor cron job was scheduled to start during the one hour gap in daylight savings time when the clocks are moved backwards one hour. (Ticket #5995).

• Fixed a bug that would cause a core dump when running the condor_history command against a remote schedd. The results would be returned correctly, but a core file would appear in the log directory after the command exited. (Ticket #5956).

• In the Python bindings, fixed bugs in the LogReader and EventIterator classes that could cause invocations of poll() to return prematurely with no event. (Ticket #5920).

• Fixed a bug in condor_dagman that caused a file named '' (two single quotes) to be created if the DAGMAN_SUPPRESS_JOB_LOGS configuration macro was set to True. (Ticket #5941).

• Fixed a bug that can cause the condor_starter to crash if the connection to the condor_shadow is lost during file transfer. (Ticket #5972).

• Fixed a bug that allowed a user to bypass the MAX_JOBS_PER_OWNER limit by specifying an accounting group or nice_user in their submit file. (Ticket #5946).

• When there are no GPUs on a machine, condor_gpu_discovery would write to stderr in addition to its normal output, this made it hard to use the -config option as intended. condor_gpu_discovery has been changed so that it will never write to stderr when the -config option is specified, instead it will write error messages as configuration comments to stdout. (Ticket #5989).

• Removed obsolete ControlGroup option from HTCondor's systemd service unit configuration file. (Ticket #5997).

• Compiled benchmarking programs as a Position Independent Executable. Position Independent Executables are a requirement for entry into Debian 9. (Ticket #5994).

• Fixed a denial of service vulnerability when using the condor_credd on the Windows platform. (Ticket #5984).

• Fixed a bug where the -pool argument would be ignored by condor_ssh_to_job under certain circumstances. (Ticket #5919).

Version 8.4.9

Release Notes:

• HTCondor version 8.4.9 released on September 29, 2016.

New Features:

• Increased the maximum number of unique attributes that can be set by the condor_chirp command set_job_attr_delayed from 50 to 100, and added the configuration knob CHIRP_DELAYED_UPDATE_MAX_ATTRS. See section 3.5.11 for more information. (Ticket #5891).

Bugs Fixed:

• Fixed a bug where if the condor_startd crashed while running a Docker universe job, the job would be left running and not removed when the condor_startd restarted. The condor_startd now removes any orphaned Docker universe jobs on restart. (Ticket #5858).

• Fixed a bug that printed spurious locking-related warnings to the StarterLog when running Docker universe jobs. (Ticket #5876).

• The Job Router and HTCondor-C now properly send a RESCHEDULE command to the condor_schedd after submitting a job. (Ticket #5903).

• Fixed bugs in the Job Router that could cause a routed job to be aborted if the UPDATE_JOB_INFO hook printed attributes to be set in the job ad. (Ticket #5899).

• The Job Router now uses the correct name for the configuration parameter for the JOB_FINALIZE hook. Previously, the Job Router used the name JOB_EXIT, counter to what was documented. (Ticket #5802).

• Updated systemd configuration to start HTCondor after NIS has started. (Ticket #5814).

• Updated systemd configuration to start HTCondor after local LDAP name service daemon has started. (Ticket #5836).

• Updated systemd configuration to attempt restart of HTCondor daemons after 1 minute. (Ticket #5836).

• In the RPM packages, move the systemd tmpfiles configuration file to the recommended directory (/usr/lib/tmpfiles.d). (Ticket #5896).

• Fixed a bug introduced in 8.4.5 that caused configuration variables starting with STARTD. or STARTER. to be ignored. (Ticket #5861).

• Fixed a typo in the desired value of `rmem_max' in the Linux kernel tuning script. Improved logging of Linux kernel tuning script by including the name of the file (not) being changed. (Ticket #5829).

• Fixed a bug that could cause the condor_master to crash after restarting the condor_shared_port daemon. (Ticket #5801).

• Fixed a bug that could cause the wrong dynamic slots to be preempted for a match when ALLOW_PSLOT_PREEMPTION is set to True. (Ticket #5748).

• Fixed a bug in cream_gahp that caused it to delegate RFC-format X.509 proxies incorrectly to the CREAM service. (Ticket #5773).

• Fixed a bug where the Windows version information was set to a single value for multiple programs. This resulted in crash boxes for most of the HTCondor tools being reported as a crash of condor_gpu_discovery (Ticket #5795).

• Fixed a bug whereby the condor_collector process would exit with an error several times per hour if the configuration knob NO_DNS is set to True. (Ticket #5762).

• Fixed monitoring of memory and CPU usage of running jobs on Mac OS X. This monitoring didn't work for a personal installation of HTCondor. With Mac OS X 10.11 and above, this monitoring resulted in a flood of errors messages to the system logs for a root-based installation. (Ticket #5777).

• Fixed a bug when attempting to authenticate using multiple methods wherein if a method failed, the remaining methods were not always attempted. (Ticket #5674).

• Fixed a bug where condor_userprio may fail to display the correct priority factor value for a user associated with a group. (Ticket #5848).

• Fixed a bug that can cause the condor_procd to crash. Fixed a bug that prevented other daemons from talking to the condor_procd when it is restarted after a crash. (Ticket #5863).

• If the condor_procd crashes, the condor_master now tries to restart it several times. Previously only one restart attempt was done. (Ticket #3655).

• Fixed a bug that resulted in the condor_starter crashing when attempting to run a BOINC backfill job. (Ticket #5862).

• Fixed a bug in the configuration language where an if defined test would reject a valid variable name when it had both an underscore and a digit. (Ticket #5914).

• Fixed a bug that caused the condor_ssh_to_job command to fail when using the HTCondor RPM installation. (Ticket #5591).

Version 8.4.8

Release Notes:

• HTCondor version 8.4.8 released on July 5, 2016.

New Features:

• None.

Bugs Fixed:

• Fixed a memory leak in the condor_q client code that impacted users of the Python API call htcondor.Schedd().query(). (Ticket #5727).

• Fixed a bug that caused file transfers to fail when using Bosco. (Ticket #5710).

• Fixed a bug that could cause the condor_schedd to crash when using SCHEDD_CRON_JOBLIST. (Ticket #5715).

• The condor_schedd now rejects job submissions when the job owner doesn't have a user account on the machine. Previously, the condor_schedd would accept such jobs and then fail to run them. (Ticket #5734).

• Fixed a bug introduced in the 8.4.7 release that resulted in the remote condor_history command failing unless the -limit argument is used. (Ticket #5735).

• Fixed a bug in condor_history that caused it to treat all unrecognized arguments as user names (Ticket #5706).

• The high-availability daemon now properly detects changes to the HAD_LIST when reconfigured. (Ticket #5753).

• The high-availability daemon now properly internalizes the HAD_LIST when reconfigured. (Ticket #5754).

• Fixed a bug that caused the condor_master to stop responding after it restarted a child daemon when shared port is enabled on Windows. This bug could also result in a hang on shutdown. (Ticket #5713).

• Fixed a bug that could cause condor_status or condor_q to crash when the -xml option is used. (Ticket #5718).

• Fixed a bug introduced in the 8.4.7 release that resulted in a parse error from condor_submit when JobAdInformationAttrs was set in the configuration variable SUBMIT_ATTRS. (Ticket #5720).

Version 8.4.7

Release Notes:

• HTCondor version 8.4.7 released on June 6, 2016.

New Features:

• Docker universe jobs now drop all Linux capabilities by default. The new knob DOCKER_DROP_ALL_CAPABILITIES, which defaults to true can be set to false to revert to the old behavior. (Ticket #5679).

• Added configuration variable MAX_TIME_SKIP to control how much system clock skip is allowed before the HTCondor daemons restart. See Section 3.5.3 for more information.

• On Linux, HTCondor appropriately tunes kernel parameters root_maxkeys and root_maxbytes to prevent condor_master startup failures on older Linux kernels. (Ticket #5671).

• The configuration variable SUBMIT_ATTRS now understands the +Attr syntax that condor_submit uses to inject attributes directly into the job ClassAd. (Ticket #5694).

• The condor_submit variable job_lease_duration can now be an expression. (Ticket #5694).

Bugs Fixed:

• All $function macro substitutions in in configuration files will now correctly handle variables with subsystem and localname prefixes as well as self references. In particular VAR = $F(VAR) now substitutes correctly rather than hanging forever. (Ticket #5565).

• Fixed a bug in Docker universe where the job would not run with the correct group id. (Ticket #5649).

• Fixed a performance problem in the condor_schedd that could cause it to become unresponsive for several minutes after the set of significant attributes for negotiation changes. (Ticket #5648).

• Fixed a bug where the python bindings ClassAd parser would fail to detect whether old or new format ClassAds were present in a stream, even though the ClassAd format was specified in advance. (Ticket #5643).

• Fixed a bug where some floating point values would have an extra .0 appended to the end when printed (e.g. 2E40.0). These values could not be read properly by normal number parsing functions. (Ticket #5682).

• When using GRIDMANAGER_SELECTION_EXPR, grid ads from different condor_gridmanager instances will no longer overwrite each other in the condor_collector. (Ticket #5683).

• In addition to logging to the file KERNEL_TUNING_LOG, the default LINUX_KERNEL_TUNING_SCRIPT now also logs to syslog and /etc/systcl.d/99-htcondor.conf. (Ticket #5489).

• Fixed a bug on condor_history that could result in truncation of the job id field. (Ticket #5527).

• On Windows, configuring HTCondor to restrict the range of outbound port numbers may cause substantial delays when using the command-line tools. Since we now know that it's not free to do so, LOWPORT and HIGHPORT no longer restrict the port numbers of outbound connections on Windows. If you still require this functionality, use OUT_LOWPORT and OUT_HIGHPORT. (Ticket #4711).

• Fixed a bug that would cause condor_submit to create extra, incorrectly named output and error files when $$ substitution is used as part of the filenames. (Ticket #2720).

• Fixed a bug that would cause the condor_history_helper to be invoked using the wrong name on Windows (Ticket #5656).

• Fixed a bug that would sometimes cause configuration variables with a subsystem prefix to be ignored. (Ticket #5310).

• Fixed a bug that could cause HAD to fail if a machine has an IPv6 address. (Ticket #5659).

• Fixed a bugs in condor_history when fetching history from a remote condor_schedd. The bugs caused complete failure when the remote condor_schedd was running Windows, and would corrupt some string values when the remote condor_schedd was any other operating system. (Ticket #5701).

Version 8.4.6

Release Notes:

• HTCondor version 8.4.6 released on April 21, 2016.

New Features:

• condor_advertise -multiple now tolerates multiple blank lines in the input file. It no longer quits parsing on the first first blank line that does not follow a valid ClassAd. (Ticket #5147).

Bugs Fixed:

• Fixed bug where when partitionable slots were enabled in the condor_startd, a job would be unable to start running on that machine in some cases. (Ticket #5626).

• Fixed a bug that would cause the condor_startd to crash when ALLOW_PSLOT_PREEMPTION was enabled. (Ticket #5586).

• Fixed a bug introduced in version 8.3 that removed the attribute REMOTE_GROUP_RESOURCES_IN_USE from the job ad in the negotiator. (Ticket #5593).

• Fixed a bug where HTCondor would regard as invalid text representations of IPv6 addresses which were the longest possible. This bug typically manifested as a failure to contact hosts which were advertising IPv6 addresses of this sort. (Ticket #5585).

• Fixed a memory leak in the condor_negotiator when ALLOW_PSLOT_PREEMPTION was enabled. (Ticket #5571).

• Fixed a bug where after a condor_schedd restart the submitter attribute WEIGHTED_JOBS_RUNNING would be incorrectly computed. (Ticket #5637).

• Fixed a bug when using CLAIM_PARTITIONABLE_LEFTOVERS and flocking. Machines from a remote pool could be treated as if they were in the local pool. As a result, the RemotePool attribute would not be set in the ads of jobs running on these machines, and the FlockedJobs and RunningJobs attributes of submitter ads would have incorrect values. (Ticket #5577).

• Fixed a bug that could cause a job's supplemental groups to be set incorrectly when SOFT_UID_DOMAIN is set to True. (Ticket #5603).

• Fixed a bug that caused supplemental groups to be set incorrectly when executing file transfer plugins and various hooks. (Ticket #5600).

• Fixed a bug that resulted in Windows 10 being reported as WindowsUnknown in the OPSYSNAME attribute of the condor_startd ClassAd. (Ticket #5575).

• Fixed a typo in the LIMIT_JOB_RUNTIMES policy configuration template that prevented the policy from working as intended. (Ticket #5307).

Version 8.4.5

Release Notes:

• HTCondor version 8.4.5 released on March 22, 2016.

New Features:

• The default for DAGMAN_LOG_ON_NFS_IS_ERROR has been changed from True to False. This is the result of changes in the 8.3 series that mean that file locking is no longer required on user logs. (Ticket #5516).

Bugs Fixed:

• Fixed a bug where HTCondor would unconditionally retry non-successful DNS lookups of the local system's hostname; this could cause delays of up to sixty seconds when using command-line tools on systems whose hostname was not in DNS. We no longer retry on errors at all, and only retry failures which are temporary. (Ticket #5553).

• Fixed a bug that would cause condor_schedds flocking to remote pools to not send no jobs, or fewer jobs than possible to the remote pool. This was a result of not correctly setting the submitter attribute WeightedJobsRunning for flocked pools. (Ticket #5539).

• Accounting group names that contain spaces are now rejected by condor_submit and ignored by the condor_negotiator. Previously, submitting a job with an accounting group name that contained a space would cause the condor_negotiator to fail at startup. (Ticket #5538).

• Fixed a bug whereby per-job history files (enabled by the configuration setting PER_JOB_HISTORY_DIR) may briefly appear to be empty or incomplete. (Ticket #5562).

• Fixed a bug whereby ClassAds written into history files may contain the same attribute multiple times. (Ticket #5548).

• Fixed a bug that caused DAGMan to not work correctly with some local universe node jobs. (This bug was introduced in version 8.3.0.) (Ticket #5299).

• Fixed a bug that resulted in jobs managed by the condor_job_router not reporting memory and disk usage of the job correctly. (Ticket #5552).

• Reworked a bug fix from the 8.4.3 release that was designed to allow for more than 100 dynamic slots to be a bit more generous in allocating Disk to those slots. Now, those slots are less prone to fail to match subsequent jobs. (Ticket #5535).

• Fixed a bug in the randomization of ports within the LOWPORT to HIGHPORT range that would sometimes generate ports outside of this range on Windows. (Ticket #5555).

• Fixed a bug in condor_off -peaceful that could result in never sending the "off" command to machines when at least one of the machines could not be contacted when sending the previous "peaceful" command. (Ticket #5504).

• When cgroups are in use, limit the amount of file system cache in the kernel to prevent the OOM killer from killing jobs that use a large amount of file system cache. (Ticket #5500).

Version 8.4.4

Release Notes:

• HTCondor version 8.4.4 released on February 4, 2016.

New Features:

• None.

Bugs Fixed:

• Fixed a bug that caused the condor_collector to crash if CONDOR_DEVELOPERS_COLLECTOR failed to resolve. (Ticket #5492).

• Fixed a bug that caused Condor-C jobs to fail when JobLeaseDuration was set to less than one hour (3600 seconds). The remote job would be aborted due to the job lease not being renewed. (Ticket #5446).

• Fixed a bug that could cause HTCondor to misreport an EC2 job as running when it had in fact been purged from the service. Fixed bugs that could cause a running EC2 job to be misreported as idle. HTCondor also no longer sends EC2 services superfluous queries. (This may increase the latency of HTCondor job status updates.) (Ticket #4568).

• The grid manager now aborts if the GAHP hangs, which we detect by the absence of a response after GRIDMANAGER_GAHP_RESPONSE_TIMEOUT seconds. The EC2 GAHP now performs many fewer memory allocations in the course of normal operations, which improves stability on some systems. (Ticket #5442).

• Fixed a bug that caused the condor_master to fail if a shared port daemon address file written by a version of HTCondor prior to 8.4.0 is present. (Ticket #5488).

• Fixed a bug that caused updates to the job attribute TimerRemove to not be respected while the job was being managed by the condor_shadow, condor_gridmanager, or the Job Router. (Ticket #5470).

• Fixed a bug where the job policy expression of a job could appear in one of the Reason attributes of another job. (Ticket #5466).

• Fixed a bug, that occurred on the Windows platform, that would cause the condor_shadow to hang while trying to delete old shadow logs when the value of MAX_NUM_SHADOW_LOG was larger than the default value of 1. This bug would also sometimes result in the condor_schedd hanging. (Ticket #5499).

Version 8.4.3

Release Notes:

• HTCondor version 8.4.3 released on December 16, 2015.

New Features:

• None.

Bugs Fixed:

• Fixed a bug that caused the -append option to be handled too late to apply to the first Queue statement in a condor_submit file. (Ticket #5414).

• Fixed a bug that prevented running more than 100 slots on a single condor_startd with partitionable slots. (Ticket #5398).

• Fixed a bug which caused ec2_iam_profile_name not to work for Spot instances. (Ticket #5410).

• Fixed a bug where the cgroup VM limit would not be set for sizes over 2 Gibibytes. (Ticket #5434).

• Fixed bugs that prevented the HTCondor daemons from working promptly at startup when the condor_shared_port daemon was in use on Windows platforms. (Ticket #5283). (Ticket #5430). (Ticket #5431). (Ticket #5432). (Ticket #5433).

• Added SELinux type enforcement rules to allow the condor_schedd to use sendmail on Enterprise Linux 7 platforms. (Ticket #5418).

• Fixed a bug where HTCondor service would not start if the condor_master.pid file was empty on Linux platforms. (Ticket #5427).

Version 8.4.2

Release Notes:

• HTCondor version 8.4.2 released on November 17, 2015.

New Features:

• condor_history no longer reports an error when run on a system that does not have a history file. This change was made because the history file is not created until after the first job runs. So, users were always seeing an error message on a fresh installation of HTCondor. (Ticket #5374).

Bugs Fixed:

• Fixed a bug introduced in 8.4.1 that could cause the condor_schedd to exit. This affected remote submit, HTCondor-CE, and HTCondor-C. (Ticket #4522).

• The TCP_FORWARDING_HOST is now honored by HTCondor client programs. (Ticket #5339).

• Fixed a problem where Standard Universe jobs could not restart from a checkpoint in the Enterprise Linux 6 RPM distribution. (Ticket #5382). (Ticket #5383).

• Fixed bugs in the function of the DAGMan DAGMAN_MAX_JOBS_IDLE/-maxidle throttle, especially for node jobs that create multiple procs. (Ticket #5333).

• Fixed a problem where the RPMs would claim to publicly provide Globus shared libraries that are in a private location. (Ticket #5349).

• Added a default request_memory for condor_submit -interactive of 512 megabytes. Formerly, the default was one, which is insufficient in environments that strictly enforce memory usage. (Ticket #5344).

• Fixed a problem were the condor_classad RPM would claim to provide a replacement for the classad RPM in EPEL. (Ticket #5400).

• HTCondor now applies the configuration settings GRIDMANAGER_GAHP_CALL_TIMEOUT and GRIDMANAGER_CONNECT_FAILURE_RETRY_COUNT when running grid universe jobs for EC2 or Google Compute Engine. (Ticket #5300).

• Fixed a crash in the condor_schedd that happened when the schedd was under load and being shutdown in the fast mode. (Ticket #5371).

• Added a timeout to the condor_fetchlog command so that it will not hang forever waiting for a unresponsive daemon. (Ticket #5325).

• Fixed a problem that prevented HTCondor from building on some 64-bit Linux platforms such as Arm64. This was reported by Debian maintainers as their Bug 804386. (Ticket #5380).

• Fixed a problem where the platform string was incorrect in the RPM packages. (Ticket #5384).

Known Issues:

• The DAGMan workflow log file is not correctly written for local universe DAG node jobs that have no log file specified in the submit file, which causes DAGMan to wait forever, thinking the jobs have not completed. Note that this problem can be worked around by specifying any log file for the job, even log = /dev/null. (This bug is a regression that was introduced some time since version 8.2.4.) (Ticket #5299).

• DAG node retries do not work correctly with DAG node submit files that create more than one proc in the resulting cluster (such nodes cause DAGMan to hang if the retry is activated). We believe that this bug has existed since DAGMan first supported multi-proc node jobs. (Ticket #5350).

Version 8.4.1

Release Notes:

• HTCondor version 8.4.1 released on October 27, 2015.

Known Issues:

• Remote submit to an 8.4.1 condor_schedd is broken if file transfer is used. This also means HTCondor-CE and HTCondor-C are broken. This bug will be fixed in version 8.4.2. (Ticket #4522).

• TCP_FORWARDING_HOST is disregarded by HTCondor clients starting in version 8.3.6. This bug will be fixed in version 8.4.2 and 8.5.1. (Ticket #5339).

New Features:

• Added support to allow an admin to always volume mount certain directories into docker universe containers running on a host. (Ticket #5308).

• Added four policy metaknobs to simplify configuring a policy to either preempt or hold jobs that use more memory or CPU cores than provisioned in the slot. See the POLICY category of metaknobs in section 3.4.2 for additional information. (Ticket #5250).

• Added configuration variables and documentation so that we uniformly prefer <var>_ATTRS over <var>_EXPRS but support both. This includes STARTD_ATTRS, STARTD_JOB_ATTRS and SUBMIT_ATTRS which are often used by HTCondor sites which customize the configuration. These configuration variables are now exclusively for use by HTCondor administrators; The former default values for these variables have been moved into other configuration which is reserved for use by HTCondor developers. This is done to prevent administrators from accidentally removing the necessary defaults. A warning about use of STARTD_EXPRS has been disabled unless STARTD_ATTRS or SLOT_TYPE_<n>_STARTD_ATTRS is also used, since the use all three of these at the same time is not supported. (Ticket #5326).

• When condor_reconfig and condor_restart are run as root they will check to see if the condor user has read access to all of the configuration files before sending the command. This is done to prevent aborting the daemons accidentally by sending reconfig after the admin creates a new config file and forgets to give the condor user read access to that file. (Ticket #4506).

• Added the -natural sort option to condor_status to sort the slots in numerical order rather than alphabetical order. (Ticket #5131).

Bugs Fixed:

• When cgroups are enabled, and CGROUP_MEMORY_POLICY is soft, HTCondor now also sets the hard limit to the virtual memory limit of the job, if there is one. (Ticket #5280).

• If cgroups are enabled, and a job goes over the memory limit, the cgroup OOM killer fires, and the job is put on hold. HTCondor now updates the job's memory usage statistics with the most up to date usage, instead of relying on the previous snapshot. (Ticket #5341).

• Fixed a bug where the condor_kbdd could not accurately measure the keyboard idle time. This daemon now works correctly on Linux systems whose X server support the MIT screen saver extension. (Ticket #5265).

• Fixed a bug which prevented SOAP submissions. (Ticket #5260).

• The parameter STARTD_HISTORY is now set to record the job histories per startd, in the log directory of the execute machine. These can be read with the condor_history command. Previously the default was not to record these. (Ticket #5257).

• The parameter SCHEDD_USE_SLOT_WEIGHT now defaults to true, so that SLOT_WEIGHT can be used with hierarchical group quotas and partitionable slots. (Ticket #5256).

• Fixed bug whereby occasionally the command-line tools would emit debug messages to stderr with text ``I am: hostname: ...''. (Ticket #5276).

• Fixed a bug that prevented node retries from working on DAG nodes that are DAG-level NOOP nodes. (This bug has existed at least since the 8.2 series.) (Ticket #5277).

• Fixed a problem when the HTCondor executables were not compiled with RPATH enabled on Enterprise Linux 6 platforms. RPATH is used to load Globus and other libraries from the condor-externals RPM. (Ticket #5294).

• The job attribute JobCurrentStartTransferOutputDate is now properly reported in the job ad. (Ticket #5298).

• Fixed configuration parameter NETWORK_HOSTNAME, which was broken starting with version 8.3.2. (Ticket #5288).

• Fixed a bug that could cause the Job Router to crash when invoking a transformation hook. (Ticket #5224).

• Fixed several memory leaks in the nordugrid_gahp. (Ticket #5322).

• Improved the batch_gahp to better handle batch systems that reuse job IDs. (Ticket #5062).

• When the batch_gahp rejects a request because it is overloaded, the condor_gridmanager now reduces the rate of requests and retries the rejected request later. (Ticket #5253).

  item The condor_had and condor_replication daemons now work properly when Shared Port is enabled. They still require their own dedicated ports. (Ticket #5301).

• Fixed a bug that cause condor_mips to report numbers about 40 percent lower than it should on Linux platforms. (Ticket #5261).

• Fixed a bug in condor_install that would cause it to configure HTCondor to advertise the public IP addresses to the collector even when using localhost or 127.0.0.1 for a personal HTCondor. (Ticket #5286).

• Fixed a bug in condor_q that caused slices in the Queue statement to be treated as part of the arguments filename when the slice was longer than 8 characters. (Ticket #5273).

• Added SELinux type enforcement rules to allow the condor_schedd to be able to access user files in NFS mounted file systems. (Ticket #5343).

Version 8.4.0

Release Notes:

• HTCondor version 8.4.0 released on September 14, 2015.

New Features:

• None.

Bugs Fixed:

• Fixed a bug introduced in HTCondor version 8.3.7 that caused the condor_shared_port daemon to leak file descriptors. Also made HTCondor work better when some HTCondor daemons are using shared port, but the condor_master is not. (Ticket #5259).

• The condor_starter lowers the OOM (out of memory) score of jobs so the OOM killer is more likely to chose an HTCondor job rather than an HTCondor daemon or other user process. (Ticket #5249).

• Job submission fails if X.509 certificates are advertised with EC2 grid universe jobs. Therefore EC2 grid universe jobs no longer advertise their access keys. (Ticket #5252).