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Remove deadlock risk in firing async events

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The PluginManager incorrectly used synchronization on firing any event
that was marked as synchronous.

This synchronized did not even protect any concurrency risk as
handlers were already thread safe in terms of mutations during event
dispatch.

The way it was used, has commonly led to deadlocks on the server,
which results in a hard crash.

This change removes the synchronize and adds some protection around enable/disable
This commit is contained in:
Aikar
2018-09-09 01:04:29 -04:00
parent 4ff931a021
commit 68b25624d8
6 changed files with 111 additions and 30 deletions
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4
Spigot-API-Patches/isChunkGenerated-API.patch
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@@ -6,7 +6,7 @@ Subject: [PATCH] isChunkGenerated API
Resolves #1329
diff --git a/src/main/java/org/bukkit/Location.java b/src/main/java/org/bukkit/Location.java
index 7e1ee875..9457832b 100644
index 7e1ee875e..9457832bc 100644
--- a/src/main/java/org/bukkit/Location.java
+++ b/src/main/java/org/bukkit/Location.java
@@ -0,0 +0,0 @@ import org.bukkit.util.NumberConversions;
@@ -34,7 +34,7 @@ index 7e1ee875..9457832b 100644
/**
* Sets the position of this Location and returns itself
diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
index a6facc4b..d5058634 100644
index a6facc4b0..d50586349 100644
--- a/src/main/java/org/bukkit/World.java
+++ b/src/main/java/org/bukkit/World.java
@@ -0,0 +0,0 @@ public interface World extends PluginMessageRecipient, Metadatable {