Steps To Get Rid Of Linux Kernel Crash Issue With Leap Second

You may get an error that the Linux kernel hangs on a leap second. It turns out there are several different ways to fix this, so we’ll get to that shortly.

According to Stultz’s post on the mailing list, when the second target fired and those hrtimers beat the main OS by a second, dozens of alarm clocks rang, suddenly waking up countless peacefully sleeping applications and overloading machine processors.

leap second linux kernel crash

On the other hand, Reddit looked a little different. Its running servers are an open source database called Cassandra, built with the nature of the Java programming language and running on Linux. From what Jason Harvey learned, Cassandra couldn’t temporarily stop Java processes, and those processes kept looping, which increased the CPU power on the Reddit servers. Reddit

Finally solved the problem by simply restarting my servers. The site was actually down for about 30-40 minutes and then went down completely for about a half break.

While Reddit had problems with Cassandra servers, Gawker had problems with Tomcat servers and therefore Mozilla had problems with Hadoop. Both Hadoop and Tomcat depend on Linux and Java and it is likely that they are affected by the same bug.

However, other systems, more experienced,It is believed that the extra arrived the day before the jump. Systems such as Linux implement the Network Time Protocol, or NTP, to connect to the world’s atomic clock and check the time. On Friday, NTP began alerting servers that leap seconds were around the corner this year, and according to Opera Software sysadmin Marco Marongiou, that’s when at least some of Opera’s servers started getting blocked as they hit the headlines. This issue is discussed on the Linux mailing list here, and it may not be clear to what extent this issue is definitely related to the htimer issue on Reddit.

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We don’t know exactly when the next leap second will be. It depends on the success of the Earth’s rotation – and it can slow down or speed up depending on the tides, the weather, and the general flow of molten metals into my Earth’s core. But when a future leap second arrives, other problems can easily arise.

Any time you’re idling all the time, there’s a good chance something will go wrong, Torvalds says. Developerski can test this possibility in advance, but it is difficult to predict how things will play out in the real world.

“Skipping a few moments and going to daylight saving time is particularly painful because it makes ads more difficult without strict rules,” he told People magazine. “And of the two, the extra seconds on steam are the more painful for those two.”

According to Torvalds, synchronizing the time measured by atomic clocks at a higher level of the Earth, in the good old decade and a half, was certainly a difficult task. In this situation, that could be part of the real problem, says Steve Allen, a programmer at the Leek Observatory, near his home in San Jose, California. “From 2000 to 2005, there were no seconds before. So all the proposals for cloud services, multiprocessing systems, etc. appeared at a time when there were no leap seconds,” he says.


  1. Presentation
  2. Upcoming Leap Second Events
  3. Environment
  4. Introducing the leap second
  5. Leap second control
  6. Famous aboutproblems
  7. Real time core
  8. Test
  9. Configuration examples
  10. Additional resources


Jump seconds is a one-second periodic adjustment associated with the Coordinated Universal Time (UTC) order that will keep the system time close to a mean solar event. However, the rate of rotation of the Earth can be affected by climatic and geological phenomena, and for this reason, UTC leap seconds are unstable and unpredictable. The purpose of this article is to provide information and facts about automatic leap seconds and how Red Hat Enterprise Linux handles a one-second insertion.

Upcoming Coordination Second Events

We are not aware of any possible leap second event at this time.


  • Red Hat Linux Enterprise versions 4, 5, 6, 7 combined with 8
  • What Is A Leap Second

    The base time for almost all international local time zones is Coordinated Universal Time (UTC). It is determined using a series of atomic lamps, installeddata in several countries around the world. The rotation of the Earth is not really constant and takes a little longer to change while the average speed of the rotator slowly decreases. For this reason, leap seconds can be inserted into the client’s UTC time scale to correct UTC time according to the actual rotation of the Earth.

    Why the second one? It exists because the Earth’s rotation on its axis determines the passage of 24-hour periods and nights, and slows down over a significantly longer period of time, primarily as a punishment for lunisolar gravitational effects. In the elements, only internal (core, mantle) and alternative (atmosphere, oceans) components affect the Earth. However, today time is probably mostly measured by 250 atomic glows from several countries, measured by the transition of electrical levels in the atom. Together, these clocks are used to calculate UTC, and since this timing mechanism is independent of the Earth, they must periodically align to the fourth. We must also take into account that pThe length of this day is closer to 2 ms today than it was in 1820. Therefore, it is not surprising that the rotation of the Earth gradually loses synchronization with UTC over time.

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