HDFS-15796. ConcurrentModificationException error happens on NameNode occasionally. Contributed by Daniel Ma
(cherry picked from commit b6c06c4b76
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@ -333,7 +333,7 @@ class PendingReconstructionBlocks {
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synchronized (pendingReconstructions) {
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synchronized (pendingReconstructions) {
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PendingBlockInfo found = pendingReconstructions.get(block);
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PendingBlockInfo found = pendingReconstructions.get(block);
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if (found != null) {
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if (found != null) {
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return found.targets;
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return new ArrayList<>(found.targets);
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}
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}
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}
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}
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return null;
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return null;
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