Fatal Error "Can't keep up!"

[14:54:06] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2442ms behind, skipping 48 tick(s)
[14:54:40] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 20685ms behind, skipping 413 tick(s)
[14:54:50] [Server thread/INFO]: L1nsey has just earned the achievement [Taking Inventory]
[14:54:50] [Client thread/INFO]: [CHAT] L1nsey has just earned the achievement [Taking Inventory]
[14:55:28] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2442ms behind, skipping 48 tick(s)
[thread 2148 also had an error]
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1. A fatal error has been detected by the Java Runtime Environment:
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2. EXCEPTION_INVALID_HANDLE (0xc0000008) at pc=0x77a12915, pid=5556, tid=8164
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3. JRE version: Java(TM) SE Runtime Environment (7.0_60-b19) (build 1.7.0_60-b19)
4. Java VM: Java HotSpot(TM) Client VM (24.60-b09 mixed mode, sharing windows-x86 )
5. Problematic frame:
6. C [ntdll.dll+0x82915]
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7. Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
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8. An error report file with more information is saved as:
9. C:\Users\Daniel\AppData\Roaming\.minecraft\hs_err_pid5556.log
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10. If you would like to submit a bug report, please visit:
11. http://bugreport.sun.com/bugreport/crash.jsp
12. The crash happened outside the Java Virtual Machine in native code.
13. See problematic frame for where to report the bug.
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    AL lib: (EE) alc_cleanup: 1 device not closed