Github user gvramana commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1147#discussion_r126420489
--- Diff: core/src/main/java/org/apache/carbondata/core/util/path/HDFSUtils.java ---
@@ -0,0 +1,188 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *
http://www.apache.org/licenses/LICENSE-2.0 + *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.carbondata.core.util.path;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.util.CarbonProperties;
+
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.DistributedFileSystem;
+import org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException;
+
+/**
+ * Implementation for HDFS utility methods
+ */
+public class HDFSUtils {
+
+ private static final int CARBON_LEASE_RECOVERY_RETRY_COUNT_MIN = 1;
+ private static final int CARBON_LEASE_RECOVERY_RETRY_COUNT_MAX = 5;
+ private static final String CARBON_LEASE_RECOVERY_RETRY_COUNT_DEFAULT = "3";
+ private static final int CARBON_LEASE_RECOVERY_RETRY_INTERVAL_MIN = 100;
+ private static final int CARBON_LEASE_RECOVERY_RETRY_INTERVAL_MAX = 10000;
+ private static final String CARBON_LEASE_RECOVERY_RETRY_INTERVAL_DEFAULT = "1000";
+
+ /**
+ * LOGGER
+ */
+ private static final LogService LOGGER =
+ LogServiceFactory.getLogService(HDFSUtils.class.getName());
+
+ /**
+ * This method will validate whether the exception thrown if for lease recovery from HDFS
+ *
+ * @param message
+ * @return
+ */
+ public static boolean checkExceptionMessageForLeaseRecovery(String message) {
+ // depending on the scenario few more cases can be added for validating lease recovery exception
+ if (null != message && message.contains("Failed to APPEND_FILE")) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * This method will make attempts to recover lease on a file using the
+ * distributed file system utility.
+ *
+ * @param filePath
+ * @return
+ * @throws IOException
+ */
+ public static boolean recoverFileLease(String filePath) throws IOException {
+ LOGGER.info("Trying to recover lease on file: " + filePath);
+ FileFactory.FileType fileType = FileFactory.getFileType(filePath);
+ switch (fileType) {
+ case ALLUXIO:
+ case HDFS:
+ case VIEWFS:
+ DistributedFileSystem dfs = null;
+ Path path = FileFactory.getPath(filePath);
+ FileSystem fs = FileFactory.getFileSystem(path);
+ dfs = (DistributedFileSystem) fs;
+ int maxAttempts = getLeaseRecoveryRetryCount();
+ int retryInterval = getLeaseRecoveryRetryInterval();
+ boolean leaseRecovered = false;
+ IOException ioException = null;
+ for (int retryCount = 1; retryCount <= maxAttempts; retryCount++) {
+ try {
+ leaseRecovered = dfs.recoverLease(path);
--- End diff --
check viwefs lease recovery mechanism
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