Not sure if this is that I need to assign more memory, a java issue or a minecraft one. Also not sure if this has been picked up, I did a search but couldn't find anything recent.
The server became unresponsive and the CPU stayed up at 77% for about 10 mins till I finally gave up and restarted the machine.
java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
Start options java -Xms512M -Xmx1536M -jar minecraft_server.18w11a.jar nogui
Was run in a screen on a limited user account.
[21:09:03] [Server Watchdog/FATAL]: A single server tick took 66.02 seconds (should be max 0.05)
[21:09:32] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[21:10:37] [User Authenticator #31/ERROR]: Caught previously unhandled exception :
[21:10:58] [Server Watchdog/ERROR]: Caught previously unhandled exception :
[21:11:15] [User Authenticator #31/ERROR]: java.lang.OutOfMemoryError: Java heap space
[21:11:09] [Server Watchdog/ERROR]: Server Watchdog
java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3332) ~[?:?]
at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:124) ~[?:?]
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:448) ~[?:?]
at java.lang.StringBuilder.append(StringBuilder.java:136) ~[?:?]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:?]
at rq.run(SourceFile:53) ~[minecraft_server.18w11a.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
[21:11:03] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.OutOfMemoryError: Java heap spaceLinked issues
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Well the issue is indeed that the server ran out of memory and the simple solution is to assign more if you have it available. I recommend at least 2G depending on the number of players connected.
Attempt to use this and see how it works:
-Xms512M -Xmx2G -jar minecraft_server.18w11a.jar nogui
Thank you very much, I will try that now.
Was shocked that the server ran out of memory as I have heard that they can run on 256MB. There were only 3 players online at the time of the crash.
Edit: The machine is a;
HP DL360 Gen 6
48GB Ram
2x 2.67Ghz Xeon
8x 146GB SAS Raid
Really did not realize minecraft servers needed 2GB of RAM for 3 players. Thanks for the heads up.
Allocating more memory did not work. It appears to be a memory leak of some sort.
I fixed this by forcing a reload every 24hrs.
Edit: Added startup circumstances to the original post.
Edit: Added java version info to the original post.