MPC Status PageThis page describes enhancements to and problems that have occurred with the MPC's webpages and scripts and the fixes that have been made. Resolved problems will remain in the Outstanding Problems sections for a brief period after resolution before being moved. This page will also try and give advance notice of the unavailability of these services due to network maintenance.
Known problems with contacting certain e-mail addresses are listed elsewhere.
Unless otherwise indicated, all times on this page are UTC times. Prior to 2010 Nov. 7, the times shown are local times (either Eastern Standard Time [UTC-5h] or Eastern Daylight time [UTC-4h], as appropriate).
Status Messages and Outstanding Problems
- DOU MPECs
2013 November 11: 18:00. Automatic issuance of DOU MPECs will be suspended temporarily while we reconfigure the procedure. There will be manual issuance of DOU MPECs at odd time over the next few days.
- NEOCP Batch Processing
2013 November 8: 23:00. Due to a recent incident of gross misidentification of an NEOCP object by an observer, NEOCP batches will henceforth be passed through the NEWNEO procedure to try and minimize similar identification problems in the future. Observers will therefore see reports that were previously sent only upon submission of a new NEO report.
- NEOCP Problems Overnight
2013 November 7: 15:45. An over-zealous cron job deleting old temporary files ignored the "do not delete this file" protection on the script that generates the variant orbits and deleted it. Needless to say, this confused the NEWNEO procedure and caused newly-reported NEO candidate to not be posted. We have replaced the deleted procedure, modified the delete cron job to be more selective, and resubmitted the batches that failed.
- Sluggish Webserver Response
2013 October 28: 13:40. We have received reports that certain web services have been unresponsive or non-function this morning. We have determined that the load on the webserver machine is extremely high, due to a number of sites sending hundreds of requests per minute to our various services. The offending IP addresses have been blocked.
- 14:18. Problems persist, so a webserver reboot is being performed.
- Network Problems
2013 October 6: 17:00. There are networking issues amongst some of our computers. These are having a major impact on some internal operations. Replacement of at least one network card is planned for the near future. Issuance of MPECs will be delayed and last night's DOU MPEC has been abandoned.
- 21:50. An interface card has been replaced. Processes have been restarted. Various backlogs have been cleared. MPEC T39 is the recovery MPEC for 2009 VA1, not the Oct. 6 DOU MPEC.
- Plotting Issue
2013 August 4: 16:15. We have identified a difference in the environment on the new webserver (which also serves as the cgi server and the DB server) when compared to the old webserver. This difference is causing dynamically-generated plots (and other temporary files) to be written to the wrong directory. This is being fixed.
- 18:00. The temporary directory issue has been fixed.
- August 6: 19:00. A (partial) fix for the PNG display of sky coverage charts and uncertainty maps in in place. The sky coverage charts are missing the textual information and the uncertainty-map grids currently show no points. The missing font problem is being looked at.
- August 7: 14:50. Copying the PGPLOT font file from the old app server to the new server, and repointing one environment variable, returned fonts to the images generated by the sky coverage and uncertainty map scripts! The generation of NEOCP uncertainty plots has been moved back to the new server.
- Mail Issues
2013 August 4: 23:13. Four of the cluster machines are experiencing problems with name resolution and e-mail. One machine that was sending email at 21:30 is no longer. The reasons for this are unclear, but it is having an impact on the operation of a number of automated routines. We are investigating.
- August 5: 14:00. After attempting to modify the existing configuration, we gave up and reconfigured the TCPIP software from scratch on all our machines. We believe all issues to be fixed.
- Some CGI Issues on the New Web Server
2013 July 31: 00:07. Dynamic image generation, as used in the cgi scripts that return uncertainty maps or sky coverage plots, are currently off-line for two reasons. The first problem was incorrect protection on the temporary directory used to store the images--this is fixed. The other problem is that PGPLOT graphics library is not installed. This is being worked on, but the automatic installation procedure is apparently not working (why am I not surprised...), so the installation may have to be done manually.
- 14:00. The PGPLOT library is installed, but the required PNG support is disabled, due to an incompatability between the PGPLOT library and the libpng library used for PNGs. This incompatability occurs on newer versions of the OS. Attempts to switch back to GIF images generated segfaults, so there may be incompatabilities here, too. We are investigating our options.
- Aug. 1: 11:33. We are trying to get the uncertainty maps for NEOCP working on the old app server. This requires a sync between the new and old machines every time the NEOCP is updated. All the necessary processes are written, but there is a protection problem with the sync process. We are trying an alternate approach.
- Aug. 1: 11:50. Textual information on NEOCP uncertainties is still functional, as is PS output of Sky Coverage plots.
- New Web Server
2013 July 29: 21:00. A new look MPC website on a new web server is being brought on-line today. The internal changes necessary to copy material to the new web server machine are complete. The switchover of the DNS records to allow external users transparent access to the new site will be done in about 90 minutes. It may take some hours for the DNS changes to propagate to all DNS servers.
- July 30: 00:50. The DNS records were updated around 22:30. The change was visible on home systems within roughly 30 minutes. The DNS record for the alias scully, which points to the script server, has to be updated by the Computation Facility. A request was put in a few hours ago, but it is unknown when the change will be made.
- Physical Move for Some MPC Computers
2013 July 24: 15:30. The MPC computers that remain at 60 Garden Street will be physically moved to CDP late on Thursday, July 25. Automated procedures will be shut down some time prior to the (as yet unknown) move time. An update will appear here when the move is completed.
- July 25: 13:45. The automated processes are being shutdown in preparation for the physical move. Patch installation will be performed before the move.
- July 26: 00:30. The patches have been installed, the systems shutdown, transported over to CDP, reconnected, powered up and the cluster has been reformed. Unfortunately, there appears to be a network issue related to the new IP addresses necessitated by the move that prevents our machine talking to any machine outside the cluster. There is nothing we can do to fix the problem. It will require the involvement of the CF and that will not happen before the morning.
- July 26: 20:40. The network problems have been resolved (incorrect configuration information supplied by the CF). We are doing some checking before restarting the automated processing routines.
- July 26: 21:20. It turns out all our key authentications are now broken due to required assignment of new IP addresses. This will need fixing before we can restart any automated processes.
- July 27: 02:00. Automated processes are being restarted.
- July 27: 13.00. Most automated processes are restarted. DOU MPEC should resume tonight.
- Two Incorrect Numbered Orbits
2013 July 24: 15:30. Following a query about non-NEOs being flagged as NEOs, we have determined that the orbits for (103790), published on MPS 266361, and (105071), published on MPS 266365 refer to the numbered objects (363790) and (365071), respectively. The problem arose because both these objects have radar observations and, at the time these orbits were prepared, the radar-orbit preparation routine did not handle designations above (359999) correctly. The radar-orbit preparation routine has been fixed and new orbits will appear on the next DOU MPEC
- Planned Power Interruption at CDP
2013 July 8: 19:05. We have been informed that there will be a power outage at CDP on Wednesday, July 10, in order to repair/replace electrical circuit breaker surge protection equipment. This is related to the May 16 issue. Computer systems, including our public-facing systems, will be shutdown starting at 20:30 UTC and power should be restored by 01:00 UTC on July 11.
- Web Site Issues
2013 July 3: 12:30. It appears that the MPC webserver is unavailable. A large number of ruby jobs (presumably doing DB updates) are running and this is clogging up the server. The script server (aliased as scully.cfa.harvard.edu) is working normally. We are investigating.
- Misassignment of Minor Planet Names in June
2013 June 26: 12:48. Due to a production error, many of the new names accepted in the June Minor Planet Circulars were assigned to the wrong minor planet. The names will be republished in the July Circulars.
- Unexpected Power Interruption May 16
2013 May 16: 16:00. We had one hour's notice that power to the building where part of our computer system resides would be turned off to allow engineering work. We were able to stop the automated processes and dismount the shadow sets, but were unable to stop the machines restarting when power was restored. This uncontrolled power up has caused major problems to the cluster. One machine is off line (service has been called) and one external disk box is not sharing its disks (one member of each of four three-member shadow sets). No data has been lost, but until the affected machine has been repaired, certain internal tasks may be delayed.
- One feature that we cannot easily replicate while the off-line machine is unavailable is complete datasets necessary for the various MPChecker facilities. Our internal checking routines are not affected by this problem.
- There is a workaround in place for the MPChecker services. Note that full functionality is not yet back in place as the service is missing the nearby-epoch data for NEOs and the historical data for all objects.
- The May Minor Planet Circulars batch will not be issued.
- Network Interruption May 14
2013 May 14: 16:00. We have been reminded that the main network router at 60 Garden Street will be upgraded during the time period 21:30 UTC on May 14 to 01:30 UTC on May 15. MPC webservices should remain accessible during this network outage, but updating of pages will not be possible due to internal network disruption.
- Potential Service Interruptions May 18
2013 May 14: 13:25. We have been informed that Computation Facility services will be unavailable between 13:00 and 18:00 UTC on Saturday, May 18. CF webservices and e-mail service will be unavailable during this period. The MPC webservices (and the updating of data used by the services) should be unaffected by this downtime.
- SKYCOV Restored
2013 Apr. 8: 16:26. The SKYCOV service has been restored to full functionality and sky coverage data is again available up to the current date.
- SKYCOV and DELCODE Removals
2013 Apr. 6: 01:52. We are now looking at repairing the SKYCOV service. This will also fix the problem of the automatic removal of DELCODE requests. In the meantime, the script that validates DELCODE requests for removal will forward the request to a staff member for removal.
- Apr. 7: 13:45. Automated removal of DELCODE requests was reactivated last night. Please report any problems with removals.
- Apr. 7: 15:45. The SKYCOV service is almost restored. Batches of sky coverage are being copied to a temporary directory on the app server. We just need to move those copied files to their final locations and rebuild the catalogue of available files. These tasks will be done tomorrow.
- File Protection Problems on Web Server
2013 Mar. 27: 12:15. Following the updating over the past two nights of various files on the web server machine, it appears that the transfer process has suddenly started disabling world/other read permission on two of the many files that it copies. This is annoying as it prevents the MPES from running. This problem has occurred in the past, for different files over varying periods of time. We are investigating the best way to locate problem files and reset the permissions if found to be wonky.
- 12:45. The potential source of the problem has been identified and a fix has been implemented. As to why only two of four transferred files (all unpacked into the same directory) were affected by this problem, we have no idea!
- AUTOACK Problem
2013 Mar. 25: 20:32. The machine that sends out ACKs and processes incoming e-mails is having hardware issues. We are investigating and attempting to move processes to another machine.
- Mar. 26: 16:31. A rebuild of the process was required. A functioning version of AUTOACK is now running on another machine. Some recent observations batches have been ACK'ed by this new routine running in test mode. Other observation batches that arrived after Mar. 25 17:16:21 UTC and before March 26, which were processed manually during the outage, will be forwarded to AUTOACK. Observers may receive two (or more) ACKs for messages. A semblence of normalcy has been restored, further work will be necessary to add functionality to the new AUTOACK process.
- Mar. 26: 14:10. The SKYCOV service has also been affected. A partial fix to this problem is forthcoming (accepting of incoming e-mails), but a full fix will have to wait until after the March Minor Planet Circulars are prepared.
- Mar. 26: 20:14. Extensive testing of the new routine showed up some problems, which have all been fixed. Automated ACKs have resumed.
- E-mail Submission of Observations Via mpc@cfa Shut Off
2013 Mar. 4: 13:32. As noted on MPEC 2013-A21, the e-mail address mpc@cfa can no longer be used for submission of observations. E-mail submission of observations must be via obs@cfa. Any future submissions of observations to mpc@cfa will not be acknowledged. The e-mail address mpc@cfa will continue as a general contact address for the MPC.
- No Mid-Month MPS Batch
2013 Feb. 8: 23.55. As a direct result of this weekend's major snow storm in New England and the consequent major risk of extended power outages, there will be no mid-month MPS batch issued this weekend.
- Problem With MPES
2013 Jan. 30: 15:14. It appears that there is a problem with one (or more) of the data files used by the MPES. We are investigating.
- 16:14. The problem with the MPES data files has been located and fixed.
- Intermittent Network Problems
2013 Jan. 9: 22:40. We have received a report from our CF that Harvard is investigating intermittent network connectivity problems. We have already received a report of a script being temporarily inaccessible.
- Extended Power Outage at CDP
2013 Jan. 3: 15:01. There was a four-hour power outage at CDP between 07:30 and 11:20 this morning. The website and scripts should again be visible. Internal operations are being restarted as necessary.
- 21:10. We have been informed that the power issue this morning fried one of the main electrical power fuses in the computer room. It will be replaced at 22:00 on Monday, January 14. This will require shutting off the power. The downtime is expected to be under 30 minutes, but one hour is the announced timeframe. Website and scripts will be off-line from around 21:30 until power is restored.
- Archive of older enhancements and problems/resolutions