mirror of
https://github.com/apache/druid.git
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8c802e4c9b
In the current design, brokers query both data nodes and tasks to fetch the schema of the segments they serve. The table schema is then constructed by combining the schemas of all segments within a datasource. However, this approach leads to a high number of segment metadata queries during broker startup, resulting in slow startup times and various issues outlined in the design proposal. To address these challenges, we propose centralizing the table schema management process within the coordinator. This change is the first step in that direction. In the new arrangement, the coordinator will take on the responsibility of querying both data nodes and tasks to fetch segment schema and subsequently building the table schema. Brokers will now simply query the Coordinator to fetch table schema. Importantly, brokers will still retain the capability to build table schemas if the need arises, ensuring both flexibility and resilience.
481 lines
17 KiB
XML
481 lines
17 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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~ Licensed to the Apache Software Foundation (ASF) under one
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~ or more contributor license agreements. See the NOTICE file
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~ distributed with this work for additional information
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~ regarding copyright ownership. The ASF licenses this file
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~ to you under the Apache License, Version 2.0 (the
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~ "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing,
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~ software distributed under the License is distributed on an
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~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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~ KIND, either express or implied. See the License for the
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~ specific language governing permissions and limitations
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~ under the License.
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-->
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>druid-server</artifactId>
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<name>druid-server</name>
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<description>Druid Server</description>
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<parent>
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<groupId>org.apache.druid</groupId>
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<artifactId>druid</artifactId>
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<version>29.0.0-SNAPSHOT</version>
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</parent>
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<dependencies>
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<dependency>
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<groupId>org.apache.druid</groupId>
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<artifactId>druid-processing</artifactId>
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<version>${project.parent.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.druid</groupId>
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<artifactId>druid-aws-common</artifactId>
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<version>${project.parent.version}</version>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.druid</groupId>
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<artifactId>druid-gcp-common</artifactId>
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<version>${project.parent.version}</version>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>com.google.http-client</groupId>
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<artifactId>google-http-client</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>jakarta.inject</groupId>
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<artifactId>jakarta.inject-api</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.zookeeper</groupId>
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<artifactId>zookeeper</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.zookeeper</groupId>
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<artifactId>zookeeper-jute</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.curator</groupId>
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<artifactId>curator-framework</artifactId>
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<!-- We use log4j2 and log4j-1.2-api as a bridge -->
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<exclusions>
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<exclusion>
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<artifactId>log4j</artifactId>
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<groupId>log4j</groupId>
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</exclusion>
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</exclusions>
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</dependency>
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<dependency>
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<groupId>org.apache.curator</groupId>
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<artifactId>curator-x-discovery</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.jaxrs</groupId>
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<artifactId>jackson-jaxrs-json-provider</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.jaxrs</groupId>
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<artifactId>jackson-jaxrs-smile-provider</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.dataformat</groupId>
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<artifactId>jackson-dataformat-smile</artifactId>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey</groupId>
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<artifactId>jersey-server</artifactId>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey</groupId>
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<artifactId>jersey-core</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.inject.extensions</groupId>
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<artifactId>guice-multibindings</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.inject.extensions</groupId>
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<artifactId>guice-servlet</artifactId>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey.contribs</groupId>
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<artifactId>jersey-guice</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-server</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-util</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-proxy</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-rewrite</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.code.findbugs</groupId>
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<artifactId>jsr305</artifactId>
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</dependency>
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<dependency>
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<groupId>io.tesla.aether</groupId>
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<artifactId>tesla-aether</artifactId>
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</dependency>
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<dependency>
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<groupId>com.amazonaws</groupId>
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<artifactId>elasticache-java-cluster-client</artifactId>
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</dependency>
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<dependency>
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<groupId>org.lz4</groupId>
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<artifactId>lz4-java</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-servlet</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-servlets</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.derby</groupId>
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<artifactId>derby</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.derby</groupId>
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<artifactId>derbynet</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.derby</groupId>
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<artifactId>derbyclient</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-math3</artifactId>
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</dependency>
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<dependency>
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<groupId>it.unimi.dsi</groupId>
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<artifactId>fastutil-core</artifactId>
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</dependency>
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<dependency>
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<groupId>com.github.ben-manes.caffeine</groupId>
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<artifactId>caffeine</artifactId>
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</dependency>
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<dependency>
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<groupId>org.jdbi</groupId>
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<artifactId>jdbi</artifactId>
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</dependency>
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<dependency>
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<groupId>io.netty</groupId>
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<artifactId>netty</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-dbcp2</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.logging.log4j</groupId>
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<artifactId>log4j-api</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.logging.log4j</groupId>
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<artifactId>log4j-core</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.datatype</groupId>
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<artifactId>jackson-datatype-joda</artifactId>
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</dependency>
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<dependency>
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<groupId>org.asynchttpclient</groupId>
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<artifactId>async-http-client</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.curator</groupId>
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<artifactId>curator-client</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.inject</groupId>
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<artifactId>guice</artifactId>
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</dependency>
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<dependency>
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<groupId>commons-codec</groupId>
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<artifactId>commons-codec</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-io</artifactId>
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</dependency>
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<dependency>
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<groupId>io.netty</groupId>
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<artifactId>netty-common</artifactId>
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</dependency>
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<dependency>
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<groupId>io.netty</groupId>
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<artifactId>netty-handler</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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</dependency>
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<dependency>
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<groupId>org.skife.config</groupId>
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<artifactId>config-magic</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.curator</groupId>
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<artifactId>curator-recipes</artifactId>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey</groupId>
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<artifactId>jersey-servlet</artifactId>
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</dependency>
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<dependency>
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<groupId>commons-io</groupId>
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<artifactId>commons-io</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.core</groupId>
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<artifactId>jackson-annotations</artifactId>
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</dependency>
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<dependency>
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<groupId>joda-time</groupId>
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<artifactId>joda-time</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.core</groupId>
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<artifactId>jackson-databind</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-client</artifactId>
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</dependency>
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<dependency>
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<groupId>javax.ws.rs</groupId>
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<artifactId>jsr311-api</artifactId>
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</dependency>
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<dependency>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.core</groupId>
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<artifactId>jackson-core</artifactId>
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</dependency>
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<dependency>
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<groupId>org.eclipse.jetty</groupId>
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<artifactId>jetty-http</artifactId>
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</dependency>
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<dependency>
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<groupId>jakarta.validation</groupId>
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<artifactId>jakarta.validation-api</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.errorprone</groupId>
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<artifactId>error_prone_annotations</artifactId>
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</dependency>
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<dependency>
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<groupId>commons-lang</groupId>
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<artifactId>commons-lang</artifactId>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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</dependency>
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<dependency>
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<groupId>io.github.resilience4j</groupId>
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<artifactId>resilience4j-bulkhead</artifactId>
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</dependency>
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<dependency>
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<groupId>io.timeandspace</groupId>
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<artifactId>cron-scheduler</artifactId>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.module</groupId>
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<artifactId>jackson-module-guice</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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</dependency>
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<!-- Tests -->
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.hamcrest</groupId>
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<artifactId>hamcrest-all</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.hamcrest</groupId>
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<artifactId>hamcrest-core</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.carrotsearch</groupId>
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<artifactId>junit-benchmarks</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.easymock</groupId>
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<artifactId>easymock</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.druid</groupId>
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<artifactId>druid-processing</artifactId>
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<version>${project.parent.version}</version>
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<type>test-jar</type>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.curator</groupId>
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<artifactId>curator-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.google.caliper</groupId>
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<artifactId>caliper</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey.jersey-test-framework</groupId>
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<artifactId>jersey-test-framework-core</artifactId>
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<version>${jersey.version}</version>
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<scope>test</scope>
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<exclusions>
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<exclusion>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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</exclusion>
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</exclusions>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey.jersey-test-framework</groupId>
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<artifactId>jersey-test-framework-grizzly2</artifactId>
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<version>${jersey.version}</version>
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<scope>test</scope>
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<exclusions>
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<exclusion>
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<groupId>javax.servlet</groupId>
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<artifactId>javax.servlet-api</artifactId>
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</exclusion>
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</exclusions>
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</dependency>
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<dependency>
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<groupId>pl.pragmatists</groupId>
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<artifactId>JUnitParams</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.github.stefanbirkner</groupId>
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<artifactId>system-rules</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey</groupId>
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<artifactId>jersey-grizzly2</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.sun.jersey</groupId>
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<artifactId>jersey-client</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.glassfish.grizzly</groupId>
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<artifactId>grizzly-http-server</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.httpcomponents</groupId>
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<artifactId>httpcore</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.assertj</groupId>
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<artifactId>assertj-core</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>nl.jqno.equalsverifier</groupId>
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<artifactId>equalsverifier</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-text</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.jacoco</groupId>
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<artifactId>jacoco-maven-plugin</artifactId>
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<configuration>
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<excludes>
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<!-- There are UTs for this class but it is very difficult to get required branch coverage -->
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<exclude>org/apache/druid/metadata/BasicDataSourceExt.class</exclude>
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<!-- Tested in the SQL layer, but, oddly, not in this module. -->
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<exclude>org/apache/druid/server/QueryResponse.class</exclude>
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<exclude>org/apache/druid/curator/CuratorModule.class</exclude>
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<!-- Guice providers where unit tests would be tightly-coupled and not useful -->
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<exclude>org/apache/druid/server/SubqueryGuardrailHelperProvider.class</exclude>
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</excludes>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-jar-plugin</artifactId>
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<executions>
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<execution>
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<goals>
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<goal>test-jar</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-dependency-plugin</artifactId>
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<configuration>
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<usedDependencies>
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<!-- These are needed for scope: compile -->
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<dependency>io.tesla.aether:tesla-aether</dependency>
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</usedDependencies>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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