zhangbutao commented on code in PR #5054: URL: https://github.com/apache/hive/pull/5054#discussion_r1499289083
########## llap-server/src/java/org/apache/hadoop/hive/llap/daemon/impl/LocalDirCleaner.java: ########## @@ -0,0 +1,113 @@ +/* + * Licensed 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.hadoop.hive.llap.daemon.impl; + +import java.io.IOException; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.nio.file.attribute.FileTime; +import java.time.Instant; +import java.time.temporal.ChronoUnit; +import java.util.Arrays; +import java.util.List; +import java.util.concurrent.Executors; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.TimeUnit; +import java.util.stream.Stream; + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hive.conf.HiveConf; +import org.apache.hadoop.service.AbstractService; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * LocalDirCleaner is an LLAP daemon service to clean up old local files. Under normal circumstances, + * intermediate/local files are cleaned up (typically at end of the DAG), but daemons crash sometimes, + * and the attached local disk might end up being the same when a new daemon starts (this applies to + * on-prem as well as cloud scenarios). + */ +public class LocalDirCleaner extends AbstractService { + private static final Logger LOG = LoggerFactory.getLogger(LocalDirCleaner.class); + + private List<String> localDirs; + + private long cleanupIntervalSec; + private long fileModifyTimeThresholdSec; + + ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); + + public LocalDirCleaner(String[] localDirs, Configuration conf) { + super("LocalDirCleaner"); + this.localDirs = Arrays.asList(localDirs); + this.cleanupIntervalSec = getInterval(conf); + this.fileModifyTimeThresholdSec = getFileModifyTimeThreshold(conf); + LOG.info("Initialized local dir cleaner: interval: {}s, threshold: {}s", cleanupIntervalSec, + fileModifyTimeThresholdSec); + } + + @Override + public void serviceStart() throws IOException { + scheduler.scheduleAtFixedRate(this::cleanup, 0, cleanupIntervalSec, TimeUnit.SECONDS); + } + + @Override + public void serviceStop() throws IOException { + // we can shutdown this service now and ignore leftovers, because under normal circumstances, + // files from the local dirs are cleaned up (so LocalDirCleaner is a best effort utility) + scheduler.shutdownNow(); + } + + private long getFileModifyTimeThreshold(Configuration conf) { + return HiveConf.getTimeVar(conf, HiveConf.ConfVars.LLAP_LOCAL_DIR_CLEANER_FILE_MODIFY_TIME_THRESHOLD, + TimeUnit.SECONDS); Review Comment: nit: ```suggestion TimeUnit.HOURS); ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
