HDDS-10652. EC Reconstruction fails with "IOException: None of the bl…

…ock data have checksum" after upgrade (apache#6520)

hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/storage/ECBlockOutputStream.java

@@ -115,17 +115,28 @@ ContainerCommandResponseProto> executePutBlock(boolean close,
     }
 
     BlockData checksumBlockData = null;
+    BlockID blockID = null;
     //Reverse Traversal as all parity will have checksumBytes
     for (int i = blockData.length - 1; i >= 0; i--) {
       BlockData bd = blockData[i];
       if (bd == null) {
         continue;
       }
+      if (blockID == null) {
+        // store the BlockID for logging
+        blockID = bd.getBlockID();
+      }
       List<ChunkInfo> chunks = bd.getChunks();
-      if (chunks != null && chunks.size() > 0 && chunks.get(0)
-          .hasStripeChecksum()) {
-        checksumBlockData = bd;
-        break;
+      if (chunks != null && chunks.size() > 0) {
+        if (chunks.get(0).hasStripeChecksum()) {
+          checksumBlockData = bd;
+          break;
+        } else {
+          ChunkInfo chunk = chunks.get(0);
+          LOG.debug("The first chunk in block with index {} does not have stripeChecksum. BlockID: {}, Block " +
+                  "size: {}. Chunk length: {}, Chunk offset: {}, hasChecksumData: {}, chunks size: {}.", i,
+              bd.getBlockID(), bd.getSize(), chunk.getLen(), chunk.getOffset(), chunk.hasChecksumData(), chunks.size());
+        }
       }
     }
 
@@ -158,9 +169,8 @@ ContainerCommandResponseProto> executePutBlock(boolean close,
       getContainerBlockData().clearChunks();
       getContainerBlockData().addAllChunks(newChunkList);
     } else {
-      throw new IOException("None of the block data have checksum " +
-          "which means " + parity + "(parity)+1 blocks are " +
-          "not present");
+      LOG.warn("Could not find checksum data in any index for blockData with BlockID {}, length {} and " +
+          "blockGroupLength {}.", blockID, blockData.length, blockGroupLength);
     }
 
     return executePutBlock(close, force, blockGroupLength);

hadoop-hdds/client/src/test/java/org/apache/hadoop/hdds/scm/storage/TestBlockOutputStreamCorrectness.java

@@ -23,9 +23,13 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
 import org.apache.commons.lang3.RandomUtils;
 import org.apache.hadoop.hdds.client.BlockID;
+import org.apache.hadoop.hdds.client.ECReplicationConfig;
 import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.apache.hadoop.hdds.protocol.MockDatanodeDetails;
 import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ChecksumType;
 import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ContainerCommandRequestProto;
 import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos.ContainerCommandResponseProto;
@@ -42,8 +46,13 @@
 import org.apache.hadoop.hdds.scm.XceiverClientSpi;
 import org.apache.hadoop.hdds.scm.pipeline.MockPipeline;
 import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
+import org.apache.hadoop.hdds.scm.pipeline.PipelineID;
 import org.apache.hadoop.ozone.OzoneConsts;
+import org.apache.hadoop.ozone.container.common.helpers.BlockData;
+import org.apache.hadoop.ozone.container.common.helpers.ChunkInfo;
 import org.apache.ratis.thirdparty.com.google.protobuf.ByteString;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
 
@@ -83,6 +92,66 @@ void test(final int writeSize) throws IOException {
     }
   }
 
+  /**
+   * Tests an EC offline reconstruction scenario in which none of the ChunkInfo in an EC stripe have stripeChecksum.
+   * Such ChunkInfo will exist for any EC data that was written in a version in which the ChunkInfo protobuf message did
+   * not have the stripeChecksum field. Here, we assert that executePutBlock during reconstruction does not throw an
+   * exception because of missing stripeChecksum. This essentially tests compatibility between an Ozone version that
+   * did not have stripeChecksum and a version that has stripeChecksum.
+   */
+  @Test
+  public void testMissingStripeChecksumDoesNotMakeExecutePutBlockFailDuringECReconstruction() throws IOException {
+    // setup some parameters required for creating ECBlockOutputStream
+    OzoneClientConfig config = new OzoneClientConfig();
+    ECReplicationConfig replicationConfig = new ECReplicationConfig(3, 2);
+    BlockID blockID = new BlockID(1, 1);
+    DatanodeDetails datanodeDetails = MockDatanodeDetails.randomDatanodeDetails();
+    Pipeline pipeline = Pipeline.newBuilder()
+        .setId(PipelineID.valueOf(datanodeDetails.getUuid()))
+        .setReplicationConfig(replicationConfig)
+        .setNodes(ImmutableList.of(datanodeDetails))
+        .setState(Pipeline.PipelineState.CLOSED)
+        // we'll executePutBlock for the parity index 5 because stripeChecksum is written to either the first or the
+        // parity indexes
+        .setReplicaIndexes(ImmutableMap.of(datanodeDetails, 5)).build();
+
+    BlockLocationInfo locationInfo = new BlockLocationInfo.Builder()
+        .setBlockID(blockID)
+        .setOffset(1)
+        .setLength(10)
+        .setPipeline(pipeline).build();
+
+    /*
+    The array of BlockData contains metadata about blocks and their chunks, and is read in executePutBlock. In
+    this test, we deliberately don't write stripeChecksum to any chunk. The expectation is that executePutBlock
+    should not throw an exception because of missing stripeChecksum.
+     */
+    BlockData[] blockData = createBlockDataWithoutStripeChecksum(blockID, replicationConfig);
+    try (ECBlockOutputStream ecBlockOutputStream = createECBlockOutputStream(config, replicationConfig, blockID,
+        pipeline)) {
+      Assertions.assertDoesNotThrow(() -> ecBlockOutputStream.executePutBlock(true, true, locationInfo.getLength(),
+          blockData));
+    }
+  }
+
+  /**
+   * Creates a BlockData array with {@link ECReplicationConfig#getRequiredNodes()} number of elements.
+   */
+  private BlockData[] createBlockDataWithoutStripeChecksum(BlockID blockID, ECReplicationConfig replicationConfig) {
+    int requiredNodes = replicationConfig.getRequiredNodes();
+    BlockData[] blockDataArray = new BlockData[requiredNodes];
+
+    // add just one ChunkInfo to each BlockData.
+    for (int i = 0; i < requiredNodes; i++) {
+      BlockData data = new BlockData(blockID);
+      // create a ChunkInfo with no stripeChecksum
+      ChunkInfo chunkInfo = new ChunkInfo("abc", 0, 10);
+      data.addChunk(chunkInfo.getProtoBufMessage());
+      blockDataArray[i] = data;
+    }
+    return blockDataArray;
+  }
+
   private BlockOutputStream createBlockOutputStream(BufferPool bufferPool)
       throws IOException {
 
@@ -114,6 +183,20 @@ private BlockOutputStream createBlockOutputStream(BufferPool bufferPool)
         () -> newFixedThreadPool(10));
   }
 
+  private ECBlockOutputStream createECBlockOutputStream(OzoneClientConfig clientConfig,
+      ECReplicationConfig repConfig, BlockID blockID, Pipeline pipeline) throws IOException {
+    final XceiverClientManager xcm = mock(XceiverClientManager.class);
+    when(xcm.acquireClient(any()))
+        .thenReturn(new MockXceiverClientSpi(pipeline));
+
+    ContainerClientMetrics clientMetrics = ContainerClientMetrics.acquire();
+    StreamBufferArgs streamBufferArgs =
+        StreamBufferArgs.getDefaultStreamBufferArgs(repConfig, clientConfig);
+
+    return new ECBlockOutputStream(blockID, xcm, pipeline, BufferPool.empty(), clientConfig, null,
+        clientMetrics, streamBufferArgs, () -> newFixedThreadPool(2));
+  }
+
   /**
    * XCeiverClient which simulates responses.
    */