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-rw-r--r--src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java b/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java
index 949ec69520..9625a86ff9 100644
--- a/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java
+++ b/src/ooxml/java/org/apache/poi/openxml4j/opc/OPCPackage.java
@@ -415,11 +415,13 @@ public abstract class OPCPackage implements RelationshipSource, Closeable {
* If your package is open read only, then you should call {@link #revert()}
* when finished with the package.
*
+ * This method is not thread-safe.
+ *
* @throws IOException
* If an IO exception occur during the saving process.
*/
@Override
- public synchronized void close() throws IOException {
+ public void close() throws IOException {
if (this.packageAccess == PackageAccess.READ) {
logger.log(POILogger.WARN,
"The close() method is intended to SAVE a package. This package is open in READ ONLY mode, use the revert() method instead !");