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Fix #4561 (revert #4430) #4562

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merged 1 commit into from
Jun 5, 2024
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Fix #4561 (revert #4430) #4562

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5 changes: 5 additions & 0 deletions release-notes/VERSION-2.x
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,11 @@ Project: jackson-databind

-

2.17.2 (not yet released)

#4561: Issues using jackson-databind 2.17.1 with Reactor
(reported by @wdallastella)

2.17.1 (04-May-2024)

#4428: `ByteBuddy` scope went beyond `test` in version 2.17.0
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19 changes: 4 additions & 15 deletions src/main/java/com/fasterxml/jackson/databind/deser/DeserializerCache.java
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Original file line number Diff line number Diff line change
@@ -1,7 +1,6 @@
package com.fasterxml.jackson.databind.deser;

import java.util.HashMap;
import java.util.concurrent.locks.ReentrantLock;

import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.*;
Expand Down Expand Up @@ -53,12 +52,6 @@ public final class DeserializerCache
protected final HashMap<JavaType, JsonDeserializer<Object>> _incompleteDeserializers
= new HashMap<JavaType, JsonDeserializer<Object>>(8);


/**
* We hold an explicit lock while creating deserializers to avoid creating duplicates.
*/
private final ReentrantLock _incompleteDeserializersLock = new ReentrantLock();

/*
/**********************************************************
/* Life-cycle
Expand Down Expand Up @@ -249,12 +242,10 @@ protected JsonDeserializer<Object> _createAndCacheValueDeserializer(Deserializat
DeserializerFactory factory, JavaType type)
throws JsonMappingException
{
/* Only one thread to construct deserializers at any given point in time;
* limitations necessary to ensure that only completely initialized ones
* are visible and used.
*/
_incompleteDeserializersLock.lock();
try {
// Only one thread to construct deserializers at any given point in time;
// limitations necessary to ensure that only completely initialized ones
// are visible and used.
synchronized (_incompleteDeserializers) {
// Ok, then: could it be that due to a race condition, deserializer can now be found?
JsonDeserializer<Object> deser = _findCachedDeserializer(type);
if (deser != null) {
Expand All @@ -277,8 +268,6 @@ protected JsonDeserializer<Object> _createAndCacheValueDeserializer(Deserializat
_incompleteDeserializers.clear();
}
}
} finally {
_incompleteDeserializersLock.unlock();
}
}

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