sunhelly commented on a change in pull request #3553:
URL: https://github.com/apache/hbase/pull/3553#discussion_r686676957
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File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScannerImpl.java
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@@ -768,7 +768,7 @@ public synchronized boolean reseek(byte[] row) throws
IOException {
}
@Override
- public void shipped() throws IOException {
+ public synchronized void shipped() throws IOException {
Review comment:
We can add some protect codes before clone the previous cell and ship
the previous blocks in the store scanner. I found the warn log occurs in
compaction.

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