| // 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.impala.catalog; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Random; |
| |
| import org.apache.impala.analysis.TableName; |
| import org.apache.impala.common.JniUtil; |
| import org.apache.impala.service.BackendConfig; |
| import org.apache.impala.service.FeSupport; |
| import org.apache.impala.thrift.TErrorCode; |
| import org.apache.impala.thrift.TTableName; |
| import org.apache.impala.thrift.TTableUsage; |
| import org.apache.impala.thrift.TUpdateTableUsageRequest; |
| import org.apache.impala.thrift.TUpdateTableUsageResponse; |
| import org.apache.log4j.Logger; |
| import org.apache.thrift.TSerializer; |
| import org.apache.thrift.protocol.TBinaryProtocol; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Track the names and the number of usages of the recently used tables and report the |
| * data to catalogd asynchronously in order to invalidate the recently unused tables. |
| */ |
| public class ImpaladTableUsageTracker { |
| private static final Logger LOG = Logger.getLogger(ImpaladTableUsageTracker.class); |
| private final static long REPORT_INTERVAL_MS = 10000; |
| private Map<TTableName, TTableUsage> unreportedUsages; |
| private Thread reportThread_; |
| |
| private ImpaladTableUsageTracker(boolean enabled) { |
| if (!enabled) return; |
| unreportedUsages = new HashMap<>(); |
| reportThread_ = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| report(); |
| } |
| }); |
| reportThread_.setDaemon(true); |
| reportThread_.setName("ImpaladTableUsageTracker daemon thread"); |
| reportThread_.start(); |
| } |
| |
| public static ImpaladTableUsageTracker createFromConfig(BackendConfig config) { |
| final boolean invalidateTableOnMemoryPressure = |
| config.invalidateTablesOnMemoryPressure(); |
| final int unusedTableTtlSec = config.getInvalidateTablesTimeoutS(); |
| Preconditions.checkArgument(unusedTableTtlSec >= 0, |
| "unused_table_ttl_sec flag must be a non-negative integer."); |
| return new ImpaladTableUsageTracker( |
| unusedTableTtlSec > 0 || invalidateTableOnMemoryPressure); |
| } |
| |
| /** |
| * Report used table names asynchronously. This might be called even if automatic |
| * invalidation is disabled, but in that case, it will be a no-op. |
| */ |
| public synchronized void recordTableUsage(Collection<TableName> tableNames) { |
| if (reportThread_ == null) return; |
| for (TableName tableName : tableNames) { |
| TTableName tTableName = tableName.toThrift(); |
| if (unreportedUsages.containsKey(tTableName)) { |
| unreportedUsages.get(tTableName).num_usages++; |
| } else { |
| unreportedUsages.put(tTableName, new TTableUsage(tTableName, 1)); |
| } |
| } |
| notify(); |
| } |
| |
| private void report() { |
| Random random = new Random(); |
| String updateFailureMessage = |
| "Unable to report table usage information to catalog server. "; |
| while (true) { |
| try { |
| // Randomly sleep for [0.5, 1.5) * REPORT_INTERVAL_MS, to avoid flooding catalogd. |
| Thread.sleep((long) (REPORT_INTERVAL_MS * (0.5 + random.nextDouble()))); |
| TUpdateTableUsageRequest reqToSend; |
| synchronized (this) { |
| if (unreportedUsages.isEmpty()) continue; |
| reqToSend = |
| new TUpdateTableUsageRequest(new ArrayList<>(unreportedUsages.values())); |
| unreportedUsages.clear(); |
| } |
| byte[] byteResp = |
| FeSupport.NativeUpdateTableUsage(new TSerializer().serialize(reqToSend)); |
| TUpdateTableUsageResponse resp = new TUpdateTableUsageResponse(); |
| JniUtil.deserializeThrift(new TBinaryProtocol.Factory(), resp, byteResp); |
| if (resp.isSetStatus() && !resp.status.status_code.equals(TErrorCode.OK)) { |
| LOG.warn( |
| updateFailureMessage + Joiner.on("\n").join(resp.status.getError_msgs())); |
| } |
| } catch (Exception e) { |
| LOG.warn(updateFailureMessage, e); |
| } |
| } |
| } |
| } |