エラーと対処法

サーバーやゲームクライアントが出すエラーをそのまま調べられます。接続エラー、メモリ不足、バージョン不一致、EULAやポートの競合と、それぞれの対処法。

• Fix Palworld "Failed to join session" and connection errors

  Palworld gives you two ways to join a server and almost all join failures come from using the wrong one for your platform. Here is which is which.

  読了時間6分 · palworld, connection, session · 2026年10月21日に更新

• Fix Rust "Disconnected: Steam Auth Timeout"

  Steam's authentication service did not answer in time, so the server could not confirm who you are. This is almost never the server, and waiting really is sometimes the fix.

  読了時間6分 · rust, steam, connection · 2026年10月21日に更新

• Your server stops seconds after starting: reading exit codes

  A server that dies within seconds has already told you why. The exit code narrows it down and the five lines above it name the cause.

  読了時間6分 · startup, exit code, console · 2026年10月21日に更新

• Fix "Exception ticking world" and corrupted chunks

  One mob, block or chunk in your world errors every time the server touches it. The crash report gives you its coordinates, and a backup is almost always the cleanest fix.

  読了時間6分 · minecraft, java, crash · 2026年10月21日に更新

• Fix "Mod rejections" and modded version mismatches

  Forge, NeoForge and Fabric compare mod lists at the door and refuse a player whose list does not match. The rejection screen names the mods, which is more help than it looks.

  読了時間6分 · minecraft, java, mods · 2026年10月21日に更新

• Fix io.netty.channel.AbstractChannel$AnnotatedConnectException

  This long Java class name is just Minecraft's networking library saying it could not connect. The words after the colon are the part that matters.

  読了時間6分 · minecraft, java, netty · 2026年10月21日に更新

• Fix "Address already in use" on a game server

  Two things want the same port and only one can have it. The usual causes are an old process that has not finished dying and a plugin quietly claiming a port of its own.

  読了時間6分 · ports, startup, troubleshooting · 2026年10月21日に更新

• Fix "A single server tick took 60.00 seconds" (watchdog crash)

  Your server froze solid for a minute, so a safety thread killed it and printed a list of what every thread was doing. That list names your culprit.

  読了時間6分 · minecraft, java, watchdog · 2026年10月21日に更新

• Fix "You need to agree to the EULA" on a Minecraft server

  Your server wrote a file called eula.txt and stopped until you change one word in it. This takes about twenty seconds in the panel.

  読了時間5分 · minecraft, java, eula · 2026年10月21日に更新

• Fix "java.lang.OutOfMemoryError: Java heap space"

  Your Java server asked for more memory than it was allowed to use and gave up. More RAM is sometimes the answer and sometimes exactly the wrong one.

  読了時間6分 · minecraft, java, memory · 2026年10月21日に更新

• Fix "Outdated server!" and "Outdated client!" in Minecraft

  These two messages tell you the server and the player are on different Minecraft versions, and the message itself tells you which way round. Here is how to read it and what to change.

  読了時間6分 · minecraft, java, version · 2026年10月21日に更新

• Fix "Failed to login: Invalid session" in Minecraft

  Invalid session is an account problem, not a server problem. Restarting the launcher fixes it most of the time, and here is what to do when it does not.

  読了時間6分 · minecraft, java, login · 2026年10月21日に更新

• Fix "Connection timed out" when joining a Minecraft server

  A timeout means nothing answered your client at all. Work down this checklist in order and you will find which of the five usual causes you have.

  読了時間6分 · minecraft, java, connection · 2026年10月21日に更新

• Fix "Internal Exception: java.io.IOException" in Minecraft

  This error means the connection between a player's client and your Minecraft server broke mid-message. Here is how to tell a bad home connection from a plugin, a proxy or a restart.

  読了時間6分 · minecraft, java, connection · 2026年10月21日に更新

このカテゴリーのガイドについて

ゲームサーバーはたいてい何が悪いのかを教えてくれますが、その言葉はクラッシュしたものの言葉です。Javaのスタックトレース、Steamの認証メッセージ、ログファイルの1行。このカテゴリーのガイドは目に見えるメッセージごとに整理してあるので、画面に出ている文字で検索すれば、試すことの一覧ではなく原因が手に入ります。

それぞれのガイドは、そのエラーが実際に何を意味するのか、どちら側から来ているのか（自分のサーバー、自分の接続、ゲーム側のサービス）、そして最短の解消方法を説明します。手元のメッセージが見つからない場合は、ホスティングの基本にあるログのガイドが、ありがちなメッセージの裏にある本当のエラーの探し方を示します。Discordでチームが一緒にログを読むこともできます。