--- a/net/minecraft/world/level/Explosion.java
+++ b/net/minecraft/world/level/Explosion.java
@@ -39,6 +39,16 @@
 import net.minecraft.world.phys.MovingObjectPosition;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import net.minecraft.world.entity.boss.EntityComplexPart;
+import net.minecraft.world.entity.boss.enderdragon.EntityEnderDragon;
+import net.minecraft.world.level.block.Blocks;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.event.entity.EntityExplodeEvent;
+import org.bukkit.Location;
+import org.bukkit.event.block.BlockExplodeEvent;
+// CraftBukkit end
+
 public class Explosion {
 
     private static final ExplosionDamageCalculator EXPLOSION_DAMAGE_CALCULATOR = new ExplosionDamageCalculator();
@@ -60,6 +70,10 @@
     private final SoundEffect explosionSound;
     private final ObjectArrayList<BlockPosition> toBlow;
     private final Map<EntityHuman, Vec3D> hitPlayers;
+    // CraftBukkit - add field
+    public boolean wasCanceled = false;
+    public float yield;
+    // CraftBukkit end
 
     public static DamageSource getDefaultDamageSource(World world, @Nullable Entity entity) {
         return world.damageSources().explosion(entity, getIndirectSourceEntityInternal(entity));
@@ -85,7 +99,7 @@
         this.hitPlayers = Maps.newHashMap();
         this.level = world;
         this.source = entity;
-        this.radius = f;
+        this.radius = (float) Math.max(f, 0.0); // CraftBukkit - clamp bad values
         this.x = d0;
         this.y = d1;
         this.z = d2;
@@ -96,6 +110,7 @@
         this.smallExplosionParticles = particleparam;
         this.largeExplosionParticles = particleparam1;
         this.explosionSound = soundeffect;
+        this.yield = this.blockInteraction == Explosion.Effect.DESTROY_WITH_DECAY ? 1.0F / this.radius : 1.0F; // CraftBukkit
     }
 
     private ExplosionDamageCalculator makeDamageCalculator(@Nullable Entity entity) {
@@ -146,6 +161,11 @@
     }
 
     public void explode() {
+        // CraftBukkit start
+        if (this.radius < 0.1F) {
+            return;
+        }
+        // CraftBukkit end
         this.level.gameEvent(this.source, GameEvent.EXPLODE, new Vec3D(this.x, this.y, this.z));
         Set<BlockPosition> set = Sets.newHashSet();
         boolean flag = true;
@@ -228,7 +248,37 @@
                         d9 /= d11;
                         d10 /= d11;
                         if (this.damageCalculator.shouldDamageEntity(this, entity)) {
-                            entity.hurt(this.damageSource, this.damageCalculator.getEntityDamageAmount(this, entity));
+                            // CraftBukkit start
+
+                            // Special case ender dragon only give knockback if no damage is cancelled
+                            // Thinks to note:
+                            // - Setting a velocity to a ComplexEntityPart is ignored (and therefore not needed)
+                            // - Damaging ComplexEntityPart while forward the damage to EntityEnderDragon
+                            // - Damaging EntityEnderDragon does nothing
+                            // - EntityEnderDragon hitbock always covers the other parts and is therefore always present
+                            if (entity instanceof EntityComplexPart) {
+                                continue;
+                            }
+
+                            CraftEventFactory.entityDamage = source;
+                            entity.lastDamageCancelled = false;
+
+                            if (entity instanceof EntityEnderDragon) {
+                                for (EntityComplexPart entityComplexPart : ((EntityEnderDragon) entity).subEntities) {
+                                    // Calculate damage separately for each EntityComplexPart
+                                    if (list.contains(entityComplexPart)) {
+                                        entityComplexPart.hurt(this.damageSource, this.damageCalculator.getEntityDamageAmount(this, entity));
+                                    }
+                                }
+                            } else {
+                                entity.hurt(this.damageSource, this.damageCalculator.getEntityDamageAmount(this, entity));
+                            }
+
+                            CraftEventFactory.entityDamage = null;
+                            if (entity.lastDamageCancelled) { // SPIGOT-5339, SPIGOT-6252, SPIGOT-6777: Skip entity if damage event was cancelled
+                                continue;
+                            }
+                            // CraftBukkit end
                         }
 
                         double d12 = (1.0D - d7) * (double) getSeenPercent(vec3d, entity);
@@ -287,9 +337,63 @@
 
             SystemUtils.shuffle(this.toBlow, this.level.random);
             ObjectListIterator objectlistiterator = this.toBlow.iterator();
+            // CraftBukkit start
+            org.bukkit.World bworld = this.level.getWorld();
+            org.bukkit.entity.Entity explode = this.source == null ? null : this.source.getBukkitEntity();
+            Location location = new Location(bworld, this.x, this.y, this.z);
+
+            List<org.bukkit.block.Block> blockList = new ObjectArrayList<>();
+            for (int i1 = this.toBlow.size() - 1; i1 >= 0; i1--) {
+                BlockPosition cpos = this.toBlow.get(i1);
+                org.bukkit.block.Block bblock = bworld.getBlockAt(cpos.getX(), cpos.getY(), cpos.getZ());
+                if (!bblock.getType().isAir()) {
+                    blockList.add(bblock);
+                }
+            }
+
+            List<org.bukkit.block.Block> bukkitBlocks;
+
+            if (explode != null) {
+                EntityExplodeEvent event = new EntityExplodeEvent(explode, location, blockList, this.yield);
+                this.level.getCraftServer().getPluginManager().callEvent(event);
+                this.wasCanceled = event.isCancelled();
+                bukkitBlocks = event.blockList();
+                this.yield = event.getYield();
+            } else {
+                BlockExplodeEvent event = new BlockExplodeEvent(location.getBlock(), blockList, this.yield);
+                this.level.getCraftServer().getPluginManager().callEvent(event);
+                this.wasCanceled = event.isCancelled();
+                bukkitBlocks = event.blockList();
+                this.yield = event.getYield();
+            }
+
+            this.toBlow.clear();
+
+            for (org.bukkit.block.Block bblock : bukkitBlocks) {
+                BlockPosition coords = new BlockPosition(bblock.getX(), bblock.getY(), bblock.getZ());
+                toBlow.add(coords);
+            }
+
+            if (this.wasCanceled) {
+                return;
+            }
+            // CraftBukkit end
+            objectlistiterator = this.toBlow.iterator();
 
             while (objectlistiterator.hasNext()) {
                 BlockPosition blockposition = (BlockPosition) objectlistiterator.next();
+                // CraftBukkit start - TNTPrimeEvent
+                IBlockData iblockdata = this.level.getBlockState(blockposition);
+                Block block = iblockdata.getBlock();
+                if (block instanceof net.minecraft.world.level.block.BlockTNT) {
+                    Entity sourceEntity = source == null ? null : source;
+                    BlockPosition sourceBlock = sourceEntity == null ? BlockPosition.containing(this.x, this.y, this.z) : null;
+                    if (!CraftEventFactory.callTNTPrimeEvent(this.level, blockposition, org.bukkit.event.block.TNTPrimeEvent.PrimeCause.EXPLOSION, sourceEntity, sourceBlock)) {
+                        this.level.sendBlockUpdated(blockposition, Blocks.AIR.defaultBlockState(), iblockdata, 3); // Update the block on the client
+                        continue;
+                    }
+                }
+                // CraftBukkit end
 
                 this.level.getBlockState(blockposition).onExplosionHit(this.level, blockposition, this, (itemstack, blockposition1) -> {
                     addOrAppendStack(list, itemstack, blockposition1);
@@ -314,7 +418,11 @@
                 BlockPosition blockposition1 = (BlockPosition) objectlistiterator1.next();
 
                 if (this.random.nextInt(3) == 0 && this.level.getBlockState(blockposition1).isAir() && this.level.getBlockState(blockposition1.below()).isSolidRender(this.level, blockposition1.below())) {
-                    this.level.setBlockAndUpdate(blockposition1, BlockFireAbstract.getState(this.level, blockposition1));
+                    // CraftBukkit start - Ignition by explosion
+                    if (!org.bukkit.craftbukkit.event.CraftEventFactory.callBlockIgniteEvent(this.level, blockposition1, this).isCancelled()) {
+                        this.level.setBlockAndUpdate(blockposition1, BlockFireAbstract.getState(this.level, blockposition1));
+                    }
+                    // CraftBukkit end
                 }
             }
         }
@@ -322,6 +430,7 @@
     }
 
     private static void addOrAppendStack(List<Pair<ItemStack, BlockPosition>> list, ItemStack itemstack, BlockPosition blockposition) {
+        if (itemstack.isEmpty()) return; // CraftBukkit - SPIGOT-5425
         for (int i = 0; i < list.size(); ++i) {
             Pair<ItemStack, BlockPosition> pair = (Pair) list.get(i);
             ItemStack itemstack1 = (ItemStack) pair.getFirst();
