Merge pull request #1834 from tronprotocol/feature/FixBugForNullPointerException

fix a bug for null pointer exception

Author: DorianRust

src/main/java/org/tron/core/db/AbstractRevokingStore.java

@@ -90,6 +90,9 @@ public synchronized void check() {
         byte[] key = e.getKey();
         byte[] value = e.getValue();
         String db = simpleDecode(key);
+        if (dbMap.get(db) == null) {
+          continue;
+        }
         byte[] realKey = Arrays.copyOfRange(key, db.getBytes().length + 4, key.length);
 
         byte[] realValue = value.length == 1 ? null : Arrays.copyOfRange(value, 1, value.length);

src/main/java/org/tron/core/db2/core/SnapshotManager.java

@@ -356,6 +356,9 @@ public void check() {
         byte[] key = e.getKey();
         byte[] value = e.getValue();
         String db = simpleDecode(key);
+        if (dbMap.get(db) == null) {
+          continue;
+        }
         byte[] realKey = Arrays.copyOfRange(key, db.getBytes().length + 4, key.length);
 
         byte[] realValue = value.length == 1 ? null : Arrays.copyOfRange(value, 1, value.length);