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Improve errors handling while downloading p2 artifacts from repository
In case an artifact couldn't be downloaded due to e.g. a bad mirror, p2 returns an RETRY error code. This code is currently ignored and Tycho simply fails with an I/O exception. Instead, Tycho attempts to download the artifact up to three times (assuming that this error code was returned), before failing. This value can be configured using the 'eclipse.p2.maxDownloadAttempts' system property.
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20 changes: 20 additions & 0 deletions
20
tycho-its/projects/p2Repository.mirror/baseline/artifacts.xml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| <?xml version='1.0' encoding='UTF-8'?> | ||
| <?artifactRepository version='1.1.0'?> | ||
| <repository name='baseline - artifacts' type='org.eclipse.equinox.p2.artifact.repository.simpleRepository' version='1'> | ||
| <properties size='2'> | ||
| <property name='p2.timestamp' value='1643973510842'/> | ||
| <property name='p2.compressed' value='false'/> | ||
| <property name ='p2.mirrorsURL' value='set by test' /> | ||
| </properties> | ||
| <mappings size='1'> | ||
| <rule filter='(& (classifier=osgi.bundle))' output='${repoUrl}/plugins/${id}_${version}.jar'/> | ||
| </mappings> | ||
| <artifacts size='1'> | ||
| <artifact classifier='osgi.bundle' id='bundle1' version='1.0.0'> | ||
| <properties size='2'> | ||
| <property name='artifact.size' value='417'/> | ||
| <property name='download.size' value='417'/> | ||
| </properties> | ||
| </artifact> | ||
| </artifacts> | ||
| </repository> |
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tycho-its/projects/p2Repository.mirror/baseline/content.xml
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| @@ -0,0 +1,34 @@ | ||
| <?xml version='1.0' encoding='UTF-8'?> | ||
| <?metadataRepository version='1.2.0'?> | ||
| <repository name='baseline - metadata' type='org.eclipse.equinox.internal.p2.metadata.repository.LocalMetadataRepository' version='1'> | ||
| <properties size='2'> | ||
| <property name='p2.timestamp' value='1643973510843'/> | ||
| <property name='p2.compressed' value='false'/> | ||
| </properties> | ||
| <units size='1'> | ||
| <unit id='bundle1' version='1.0.0' singleton='false'> | ||
| <update id='bundle1' range='[0.0.0,1.0.0)' severity='0'/> | ||
| <provides size='4'> | ||
| <provided namespace='org.eclipse.equinox.p2.iu' name='bundle1' version='1.0.0'/> | ||
| <provided namespace='osgi.bundle' name='bundle1' version='1.0.0'/> | ||
| <provided namespace='osgi.identity' name='bundle1' version='1.0.0'> | ||
| <properties size='1'> | ||
| <property name='type' value='osgi.bundle'/> | ||
| </properties> | ||
| </provided> | ||
| <provided namespace='org.eclipse.equinox.p2.eclipse.type' name='bundle' version='1.0.0'/> | ||
| </provides> | ||
| <artifacts size='1'> | ||
| <artifact classifier='osgi.bundle' id='bundle1' version='1.0.0'/> | ||
| </artifacts> | ||
| <touchpoint id='org.eclipse.equinox.p2.osgi' version='1.0.0'/> | ||
| <touchpointData size='1'> | ||
| <instructions size='1'> | ||
| <instruction key='manifest'> | ||
| Bundle-SymbolicName: bundle1
Bundle-Version: 1.0.0
 | ||
| </instruction> | ||
| </instructions> | ||
| </touchpointData> | ||
| </unit> | ||
| </units> | ||
| </repository> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| <mirrors> | ||
| <mirror url ='set by test'/> | ||
| <mirror url ='set by test'/> | ||
| </mirrors> |
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tycho-its/projects/p2Repository.mirror/baseline/plugins/bundle1_1.0.0.jar
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tycho-its/projects/p2Repository.mirror/bundle/META-INF/MANIFEST.MF
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| Manifest-Version: 1.0 | ||
| Bundle-ManifestVersion: 2 | ||
| Bundle-SymbolicName: bundle1 | ||
| Bundle-Version: 1.0.0 | ||
| Automatic-Module-Name: bundle1 | ||
|
|
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| bin.includes = META-INF/ |
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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> | ||
| <modelVersion>4.0.0</modelVersion> | ||
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| <parent> | ||
| <groupId>p2Repository.mirror</groupId> | ||
| <artifactId>parent</artifactId> | ||
| <version>0.0.1-SNAPSHOT</version> | ||
| </parent> | ||
|
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| <packaging>eclipse-plugin</packaging> | ||
| <artifactId>bundle1</artifactId> | ||
| <version>1.0.0</version> | ||
|
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| <build> | ||
| <plugins> | ||
| <plugin> | ||
| <groupId>org.eclipse.tycho</groupId> | ||
| <artifactId>tycho-baseline-plugin</artifactId> | ||
| <version>${tycho-version}</version> | ||
| <executions> | ||
| <execution> | ||
| <id>compare-version-with-baseline</id> | ||
| <phase>verify</phase> | ||
| <goals> | ||
| <goal>verify</goal> | ||
| </goals> | ||
| </execution> | ||
| </executions> | ||
| <configuration> | ||
| <ignores> | ||
| <ignore>META-INF/maven/**/*</ignore> | ||
| </ignores> | ||
| <baselines> | ||
| <repository> | ||
| <id>repo</id> | ||
| <url>${baseline}</url> | ||
| <layout>p2</layout> | ||
| </repository> | ||
| </baselines> | ||
| </configuration> | ||
| </plugin> | ||
| </plugins> | ||
| </build> | ||
| </project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> | ||
| <modelVersion>4.0.0</modelVersion> | ||
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| <groupId>p2Repository.mirror</groupId> | ||
| <artifactId>parent</artifactId> | ||
| <version>0.0.1-SNAPSHOT</version> | ||
| <packaging>pom</packaging> | ||
|
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||
| <modules> | ||
| <module>bundle</module> | ||
| </modules> | ||
|
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| <build> | ||
| <plugins> | ||
| <plugin> | ||
| <groupId>org.eclipse.tycho</groupId> | ||
| <artifactId>tycho-maven-plugin</artifactId> | ||
| <version>${tycho-version}</version> | ||
| <extensions>true</extensions> | ||
| </plugin> | ||
| </plugins> | ||
| </build> | ||
| </project> |
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tycho-its/src/test/java/org/eclipse/tycho/test/p2Repository/P2RepositoryMirrorTest.java
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| /******************************************************************************* | ||
| * Copyright (c) 2024 Patrick Ziegler and others. | ||
| * This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License 2.0 | ||
| * which accompanies this distribution, and is available at | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Patrick Ziegler - initial API and implementation | ||
| *******************************************************************************/ | ||
| package org.eclipse.tycho.test.p2Repository; | ||
|
|
||
| import java.io.File; | ||
| import java.io.FileWriter; | ||
|
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| import javax.xml.parsers.DocumentBuilder; | ||
| import javax.xml.parsers.DocumentBuilderFactory; | ||
| import javax.xml.transform.Transformer; | ||
| import javax.xml.transform.TransformerFactory; | ||
| import javax.xml.transform.dom.DOMSource; | ||
| import javax.xml.transform.stream.StreamResult; | ||
| import javax.xml.xpath.XPath; | ||
| import javax.xml.xpath.XPathConstants; | ||
| import javax.xml.xpath.XPathFactory; | ||
|
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| import org.apache.maven.it.Verifier; | ||
| import org.eclipse.jetty.servlet.DefaultServlet; | ||
| import org.eclipse.jetty.util.resource.EmptyResource; | ||
| import org.eclipse.jetty.util.resource.Resource; | ||
| import org.eclipse.tycho.test.AbstractTychoIntegrationTest; | ||
| import org.eclipse.tycho.test.util.HttpServer; | ||
| import org.junit.After; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
| import org.w3c.dom.Document; | ||
| import org.w3c.dom.Element; | ||
| import org.w3c.dom.NodeList; | ||
|
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| public class P2RepositoryMirrorTest extends AbstractTychoIntegrationTest { | ||
|
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| private HttpServer server; | ||
|
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| @Before | ||
| public void startServer() throws Exception { | ||
| server = HttpServer.startServer(); | ||
| } | ||
|
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| @After | ||
| public void stopServer() throws Exception { | ||
| server.stop(); | ||
| } | ||
|
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| /** | ||
| * Tests whether Tycho is able to recover from a bad mirror repository. If | ||
| * multiple mirrors are specified for a repository, Tycho might be able to | ||
| * continue by requesting an artifact from a different mirror, depending on the | ||
| * error code returned by Equinox. | ||
| */ | ||
| @Test | ||
| public void testMirrorWithRetry() throws Exception { | ||
| Verifier verifier = getVerifier("p2Repository.mirror", false); | ||
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| String baseline = server.addServer("baseline", FirstBaselineRequestFailsServlet.class, | ||
| new File(verifier.getBasedir(), "baseline")); | ||
| // Two mirrors, to always have at least one that is still good | ||
| String mirror1 = server.addServer("mirror1", FirstBaselineRequestFailsServlet.class, | ||
| new File(verifier.getBasedir(), "baseline")); | ||
| String mirror2 = server.addServer("mirror2", FirstBaselineRequestFailsServlet.class, | ||
| new File(verifier.getBasedir(), "baseline")); | ||
| String mirrors = baseline + '/' + "mirrors.xml"; | ||
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| setMirrorsUrl(new File(verifier.getBasedir(), "baseline/artifacts.xml"), mirrors); | ||
| setMirrors(new File(verifier.getBasedir(), "baseline/mirrors.xml"), mirror1, mirror2); | ||
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| // The verifier escapes the 'http://localhost' to 'http:/localhost' | ||
| verifier.addCliOption("-Dbaseline=" + baseline.replaceAll("//", "////")); | ||
| // Force an update of the HttpCache | ||
| verifier.addCliOption("-U"); | ||
| verifier.executeGoal("verify"); | ||
| verifier.verifyErrorFreeLog(); | ||
| verifier.verifyTextInLog("Artifact repository requested retry (attempt [1/3]):"); | ||
| } | ||
|
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| @Override | ||
| protected boolean isDisableMirrors() { | ||
| return false; | ||
| } | ||
|
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| /** | ||
| * Updates the "p2.mirrorsURL" property in the {@code artifacts.xml} file of the | ||
| * baseline repository to point to the {@code mirrors.xml} file. | ||
| */ | ||
| private static void setMirrorsUrl(File artifactsXml, String mirrorsUrl) throws Exception { | ||
| Document document = parseDocument(artifactsXml); | ||
|
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| XPath path = XPathFactory.newInstance().newXPath(); | ||
| String expression = "repository/properties/property[@name='p2.mirrorsURL']"; | ||
| Element node = (Element) path.evaluate(expression, document, XPathConstants.NODE); | ||
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| if (node != null) { | ||
| node.setAttribute("value", mirrorsUrl); | ||
| writeDocument(document, artifactsXml); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Updates the {@link mirrors.xml} file to contain the bad mirror. | ||
| */ | ||
| private static void setMirrors(File mirrorsXml, String mirror1, String mirror2) throws Exception { | ||
| Document document = parseDocument(mirrorsXml); | ||
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| XPath path = XPathFactory.newInstance().newXPath(); | ||
| String expression = "mirrors/mirror"; | ||
| NodeList nodes = (NodeList) path.evaluate(expression, document, XPathConstants.NODESET); | ||
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| if (nodes != null) { | ||
| ((Element) nodes.item(0)).setAttribute("url", mirror1); | ||
| ((Element) nodes.item(1)).setAttribute("url", mirror2); | ||
| writeDocument(document, mirrorsXml); | ||
| } | ||
| } | ||
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| public static Document parseDocument(File file) throws Exception { | ||
| DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); | ||
| DocumentBuilder builder = factory.newDocumentBuilder(); | ||
| return builder.parse(file); | ||
| } | ||
|
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| public static void writeDocument(Document document, File file) throws Exception { | ||
| TransformerFactory transformerFactory = TransformerFactory.newInstance(); | ||
| Transformer transformer = transformerFactory.newTransformer(); | ||
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| try (FileWriter writer = new FileWriter(file)) { | ||
| DOMSource source = new DOMSource(document); | ||
| StreamResult result = new StreamResult(writer); | ||
| transformer.transform(source, result); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Helper servlet to simulate an illegal p2 repository. The first time a plugin | ||
| * is requested from the remote repository, a 404 is returned. Any further | ||
| * requests succeed, to test whether Tycho is able to recover from bad mirrors. | ||
| */ | ||
| public static class FirstBaselineRequestFailsServlet extends DefaultServlet { | ||
| // We don't know which mirror is selected, so anyone can fail | ||
| private static boolean firstRequest = true; | ||
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| @Override | ||
| public Resource getResource(String pathInContext) { | ||
| if (firstRequest && pathInContext.startsWith("/plugins/")) { | ||
| firstRequest = false; | ||
| return EmptyResource.INSTANCE; | ||
| } | ||
| return super.getResource(pathInContext); | ||
| } | ||
| } | ||
| } |
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