Minecraft Forums

At first I thought it was because of Mineplex and other large servers, and thought that it was my modem which couldn't take such a huge amount of people in the server.

But it kept restarting my modem every time with smaller servers. Now I can't even play in a server with only 100 people, and restarts the same way. So it's definitely not my modem.

Whenever it does, it shows this message

-- Head --
Thread: Client thread
Stacktrace:
at io.netty.bootstrap.Bootstrap.checkAddress(Bootstrap.java:273)
at io.netty.bootstrap.Bootstrap.doConnect(Bootstrap.java:150)
at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:132)
at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:113)
at bls.b(SourceFile:165)
at bls.a(SourceFile:45)
at bls$1.a(SourceFile:144)
at eo.l(SourceFile:382)
at bls.a(SourceFile:254)
at bhj.e(SourceFile:116)

-- Affected screen --
Details:
Screen name: bhj
Stacktrace:
at bcx.t(SourceFile:1601)
at bcx.av(SourceFile:968)
at bcx.a(SourceFile:396)
at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
Minecraft Version: 1.10
Operating System: Windows 8.1 (x86) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle
Corporation
Memory: 186689440 bytes (178 MB) / 270667776 bytes (258 MB) up to
523501568 bytes (499 MB)
JVM Flags: 6 total; -
XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe
.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-
UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.10
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics GL version 4.0.0 - Build 10.18.10.3304,
Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate
blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is
untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 2x Intel(R) Celeron(R) CPU 1000M @ 1.80GHz

", monospace">Anyone know how to fix it?

"restarting my modem"

What does this mean exactly? If you have an external device that is rebooting then that device has a problem.