[close #634] fix rawBatchPut hang while batch size is larger than MAX_RAW_BATCH_LIMIT (#640)

src/main/java/org/tikv/raw/RawKVClient.java

@@ -749,17 +749,18 @@ public class RawKVClient implements RawKVClientBase {
     while (!taskQueue.isEmpty()) {
       List<Batch> task = taskQueue.poll();
       for (Batch batch : task) {
-        completionService.submit(
-            () -> doSendBatchPutInBatchesWithRetry(batch.getBackOffer(), batch, ttl));
+        futureList.add(
+            completionService.submit(
+                () -> doSendBatchPutInBatchesWithRetry(batch.getBackOffer(), batch, ttl)));
+      }
 
-        try {
-          getTasks(completionService, taskQueue, task, deadline - System.currentTimeMillis());
-        } catch (Exception e) {
-          for (Future<List<Batch>> future : futureList) {
-            future.cancel(true);
-          }
-          throw e;
+      try {
+        getTasks(completionService, taskQueue, task, deadline - System.currentTimeMillis());
+      } catch (Exception e) {
+        for (Future<List<Batch>> future : futureList) {
+          future.cancel(true);
         }
+        throw e;
       }
     }
   }

src/test/java/org/tikv/raw/RawKVClientTest.java

@@ -20,6 +20,7 @@ package org.tikv.raw;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
+import static org.tikv.raw.RawKVClientBase.MAX_RAW_BATCH_LIMIT;
 
 import com.google.common.collect.ImmutableList;
 import com.google.protobuf.ByteString;
@@ -360,7 +361,7 @@ public class RawKVClientTest extends BaseRawKVTest {
     }
 
     int i = 0;
-    Iterator<KvPair> iter = client.scan0(prefix, ByteString.EMPTY, cnt);
+    Iterator<KvPair> iter = client.scanPrefix0(prefix, cnt, false);
     while (iter.hasNext()) {
       i++;
       KvPair pair = iter.next();
@@ -369,7 +370,7 @@ public class RawKVClientTest extends BaseRawKVTest {
     assertEquals(cnt, i);
 
     i = 0;
-    iter = client.scan0(prefix, ByteString.EMPTY, true);
+    iter = client.scanPrefix0(prefix, true);
     while (iter.hasNext()) {
       i++;
       KvPair pair = iter.next();
@@ -397,7 +398,7 @@ public class RawKVClientTest extends BaseRawKVTest {
         });
     client.ingest(kvs);
 
-    assertEquals(client.scan(prefix, ByteString.EMPTY).size(), cnt);
+    assertEquals(client.scanPrefix(prefix).size(), cnt);
   }
 
   @Test
@@ -1084,4 +1085,15 @@ public class RawKVClientTest extends BaseRawKVTest {
       return FastByteComparisons.compareTo(startKey.toByteArray(), endKey.toByteArray());
     }
   }
+
+  @Test
+  public void testBatchPutForIssue634() {
+    ByteString prefix = ByteString.copyFromUtf8("testBatchPutForIssue634");
+    client.deletePrefix(prefix);
+    HashMap<ByteString, ByteString> kvs = new HashMap<>();
+    for (int i = 0; i < MAX_RAW_BATCH_LIMIT * 4; i++) {
+      kvs.put(prefix.concat(ByteString.copyFromUtf8("key@" + i)), rawValue("value@" + i));
+    }
+    client.batchPut(kvs);
+  }
 }