maven indexing lucene renovation #3558

mbien · 2022-02-05T12:33:06Z

Check if the maven repo indexing module can be upgraded from apache lucene 5.x to 9.x.

lucene 9.x requires Java 11+, so we have to stick with 8.x
upgrading lucene requires upgrading maven-indexer to 6.10+
unfortunately it has to be done in one step since there don't appear to be any maven-indexer releases compatible with lucene 6.x or 7.x.

note:

code cleanup has its own commit, the interesting changes are in the other commits

progress:

wait for release of maven-indexer 6.10 ([MINDEXER-104] Migrate to Lucene 8.x maven-indexer#169) (~~using local SNAPSHOT atm~~)
ClassDependencyIndexCreatorTest.testFindClassUsages() fails with no results found, other tests are green.
investigate assertion error in BooleanQuery.hashCode / lucene -> https://issues.apache.org/jira/browse/LUCENE-10431 -> maven indexing lucene renovation #3558 (comment)
investigate index out of bounds exception during local repo indexing / maven-indexer -> https://issues.apache.org/jira/browse/MINDEXER-144 + workaround found
maven.apisupport tests were failing since they loaded the wrong lucene jars (3.x) while using loading maven-indexer 6.1:

...
[26,138s][info][class,load] org.apache.lucene.store.SimpleFSDirectory source: file:/home/mbien/NetBeansProjects/netbeans/nbbuild/netbeans/ide/modules/ext/lucene-core-3.6.2.jar
[26,138s][info][class,load] org.apache.lucene.search.BooleanQuery$TooManyClauses source: file:/home/mbien/NetBeansProjects/netbeans/nbbuild/netbeans/ide/modules/ext/lucene-core-3.6.2.jar
[26,138s][info][class,load] org.apache.maven.index.ArtifactInfoFilter source: file:/home/mbien/NetBeansProjects/netbeans/nbbuild/netbeans/java/modules/ext/maven/indexer-core-6.1.1.jar
[26,138s][info][class,load] org.apache.maven.index.updater.WagonHelper$WagonFetcher source: file:/home/mbien/NetBeansProjects/netbeans/nbbuild/netbeans/java/modules/ext/maven/indexer-core-6.1.1.jar
...

the same maven.apisupport tests are now timing out since they decided to download and index the entire maven central repo

mbien · 2022-02-16T02:57:59Z

It turned out that the reason for findClassUsages() not returning any hits was maven-indexerproducing lower case based queries, while ClassDependencyIndexCreator encodes class dependencies in searchable Base64 encoded CRC32 Strings (-> case sensitive). This worked for some reason with old lucene (maybe searches were case insensitive?) but fails now after the lucene upgrade, since there is an asymmetry between the tokenizing phase and the query phase.

But even if it worked before, it is likely still a bug since it could produce false positives if I see this correctly. In any case a big part of the Base64 key space is wasted.

The hack 587084e simulates the old behavior and lets all tests pass locally.

potential fix: encode with Base32 instead (in lowercase, but this would be 7 chars (1 char longer) or find other solution preferably via lucene, unfortunately maven-indexer has it's NexusAnalyzer hard coded.

mbien · 2022-02-19T02:29:23Z

regarding the timeout of NBMNativeMWITest
The junit tests expected the query to fail with a NPE in the indexer code

netbeans/apisupport/maven.apisupport/src/org/netbeans/modules/maven/apisupport/MavenNbModuleImpl.java

Lines 145 to 149 in c084119

    
           catch (NullPointerException ex) { 
        
               // This exceptions occurs during unit tests so default to LATEST_NBM_PLUGIN_VERSION 
        
               LOG.log(Level.WARNING, "Unable to get latest nbm-maven-plugin version number"); 
        
           } 
        
           return LATEST_NBM_PLUGIN_VERSION;

post migration, the NPE does not occur. The query appears to work. However, this causes the download+indexing of the maven central repo. Which causes a timeout after 3 minutes.

So my question is: was the test originally supposed to download the index?

NPE suppression was added here: 57e21b8

suppressed exception for reference (pre-migration):

java.lang.NullPointerException: Cannot invoke "org.apache.maven.index.Indexer.createIndexingContext(String, String, java.io.File, java.io.File, String, String, boolean, boolean, java.util.List)" because "this.indexer" is null
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.addIndexingContextForced(NexusRepositoryIndexerImpl.java:272)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.loadIndexingContext2(NexusRepositoryIndexerImpl.java:335)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.access$700(NexusRepositoryIndexerImpl.java:122)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$6.run(NexusRepositoryIndexerImpl.java:940)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$6.run(NexusRepositoryIndexerImpl.java:937)
	at org.netbeans.modules.openide.util.DefaultMutexImplementation.writeAccess(DefaultMutexImplementation.java:229)
	at org.openide.util.Mutex.writeAccess(Mutex.java:252)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.iterate(NexusRepositoryIndexerImpl.java:937)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.getVersions(NexusRepositoryIndexerImpl.java:1153)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.getVersions(NexusRepositoryIndexerImpl.java:1148)
	at org.netbeans.modules.maven.indexer.api.RepositoryQueries.lambda$getVersionsResult$4(RepositoryQueries.java:314)
	at org.netbeans.modules.maven.indexer.api.RepositoryQueries.getQueryResult(RepositoryQueries.java:217)
	at org.netbeans.modules.maven.indexer.api.RepositoryQueries.getVersionsResult(RepositoryQueries.java:311)
	at org.netbeans.modules.maven.apisupport.MavenNbModuleImpl.getLatestNbmPluginVersion(MavenNbModuleImpl.java:133)
	at org.netbeans.modules.maven.apisupport.NBMNativeMWI$AdditionalOperations.performOperation(NBMNativeMWI.java:250)
	at org.netbeans.modules.maven.apisupport.NBMNativeMWI$AdditionalOperations.performOperation(NBMNativeMWI.java:141)
	at org.netbeans.modules.maven.model.Utilities.performPOMModelOperations(Utilities.java:318)
	at org.netbeans.modules.maven.spi.newproject.CreateProjectBuilder.create(CreateProjectBuilder.java:146)
	at org.netbeans.modules.maven.apisupport.NBMNativeMWI.instantiate(NBMNativeMWI.java:69)
	at org.netbeans.modules.maven.apisupport.NBMNativeMWITest.testPathNoParent(NBMNativeMWITest.java:54)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at junit.framework.TestCase.runTest(TestCase.java:177)
	at org.netbeans.junit.NbTestCase.access$200(NbTestCase.java:77)
	at org.netbeans.junit.NbTestCase$2.doSomething(NbTestCase.java:476)
	at org.netbeans.junit.NbTestCase$1Guard.run(NbTestCase.java:402)
	at org.netbeans.junit.NbTestCase.runBare(NbTestCase.java:495)
	at junit.framework.TestResult$1.protect(TestResult.java:122)
	at junit.framework.TestResult.runProtected(TestResult.java:142)
	at junit.framework.TestResult.run(TestResult.java:125)
	at junit.framework.TestCase.run(TestCase.java:130)
	at org.netbeans.junit.NbTestCase.run(NbTestCase.java:291)
	at junit.framework.TestSuite.runTest(TestSuite.java:241)
	at junit.framework.TestSuite.run(TestSuite.java:236)

mbien · 2022-02-20T12:44:02Z

switched to lowercase base32 encoding since I couldn't find any other way to make it work.

index size wise, the base64->base32 switch did not make any noteworthy difference. Both versions however are ~800 MB smaller when compared to the old lucene 5 index (fresh maven central index).

13-rc4_cache/mavenindex 139 items, totalling 5,1 GB
dev_cache/mavenindex 161 items, totalling 4,3 GB

mbien · 2022-02-22T07:27:57Z

java/maven.indexer/src/org/netbeans/modules/maven/indexer/CustomArtifactContextProducer.java

+    @Override
+    protected Gav getGavFromPath(IndexingContext context, String repositoryPath, String artifactPath) {
+        // filter out maven-metadata[-repo_name].xml to avoid IndexOutOfBoundsExceptions in
+        // org.apache.maven.index.artifact.M2GavCalculator.getSnapshotGav(M2GavCalculator.java:187)
+        if (artifactPath.endsWith(".xml") && artifactPath.substring(artifactPath.lastIndexOf("/")+1).startsWith("maven-metadata")) {
+            return null;
+        }
+        return super.getGavFromPath(context, repositoryPath, artifactPath);
+    }


added a workaround for the IOOBE in maven-indexer.

issue filed under:
https://issues.apache.org/jira/browse/MINDEXER-144

ebarboni · 2022-02-22T13:16:45Z

Hi @mbien, I'm not sure my issue is related to your task but the Apache NetBeans indexer was not able to index Apache Archiva repository for a long time. It seems that your patch make it working again.
Typical stacktrace.
INFO [org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl]: Downloaded maven index file has size 38?912 (zipped). The usable space in **mydrive** is 348?321?529?856. INFO [org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl]: could not (re-)index **arepoid** java.lang.IllegalArgumentException: The legacy format is no longer supported by this version of maven-indexer. at org.apache.maven.index.updater.DefaultIndexUpdater.loadIndexDirectory(DefaultIndexUpdater.java:210) at org.apache.maven.index.updater.DefaultIndexUpdater.access$300(DefaultIndexUpdater.java:76) at org.apache.maven.index.updater.DefaultIndexUpdater$LuceneIndexAdaptor.setIndexFile(DefaultIndexUpdater.java:518) at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:752) at org.apache.maven.index.updater.DefaultIndexUpdater.fetchAndUpdateIndex(DefaultIndexUpdater.java:161) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexLoadedRepo(NexusRepositoryIndexerImpl.java:523) Caused: java.io.IOException: Failed to load maven-index for: **repourl** at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexLoadedRepo(NexusRepositoryIndexerImpl.java:536) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.access$200(NexusRepositoryIndexerImpl.java:122) [catch] at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$3.run(NexusRepositoryIndexerImpl.java:654) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$3.run(NexusRepositoryIndexerImpl.java:647) at org.netbeans.modules.openide.util.DefaultMutexImplementation.writeAccess(DefaultMutexImplementation.java:229) at org.openide.util.Mutex.writeAccess(Mutex.java:252) at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.indexRepo(NexusRepositoryIndexerImpl.java:647) at org.netbeans.modules.maven.indexer.api.RepositoryIndexer.indexRepo(RepositoryIndexer.java:42) at org.netbeans.modules.maven.repository.RepositoryNode$RefreshIndexAction$1.run(RepositoryNode.java:228) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418) at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45) at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

mbien · 2022-02-22T23:38:36Z

@ebarboni thanks Eric for testing. That is good news. This PR was a little bit of a minefield :)

mbien · 2022-02-25T06:45:24Z

for future reference, the assertion error in BooleanQuery.hashcode() attached below.

netbeans/java/maven.indexer/src/org/netbeans/modules/maven/indexer/NexusRepositoryIndexerImpl.java

Lines 1451 to 1457 in 04fa8fb

    
                   bq.add(new BooleanClause(setBooleanRewrite(q), occur)); 
        
               } else { 
        
                   //TODO when all fields, we need to create separate 
        
                   //queries for each field. 
        
               } 
        
           } 
        
           IteratorSearchResponse resp = repeatedPagedSearch(bq.build(), Collections.singletonList(context), MAX_RESULT_COUNT);

Problem can be mitigated by not changing the rewrite method to MultiTermQuery.CONSTANT_SCORE_BOOLEAN_REWRITE recursively via setBooleanRewrite(query), or not running with assertions enabled.

lucene issue filed:

https://issues.apache.org/jira/browse/LUCENE-10431

PRs:

LUCENE-10431: Remove MultiTermQuery.setRewriteMethod() lucene#726
LUCENE-10431: Don't include rewriteMethod in MTQ hash calculation lucene#727 unfortunately, there are no updates to the 8.x branch planned, so it might not get backported

Issue can be triggered via UI, right click on project dependencies -> "Add Dependency..." -> use "query:" search field, e.g enter "org.eclipse.jetty".

java.lang.AssertionError
	at org.apache.lucene.search.BooleanQuery.hashCode(BooleanQuery.java:614)
	at java.base/java.util.Objects.hashCode(Objects.java:103)
	at java.base/java.util.HashMap$Node.hashCode(HashMap.java:298)
	at java.base/java.util.AbstractMap.hashCode(AbstractMap.java:527)
	at org.apache.lucene.search.Multiset.hashCode(Multiset.java:119)
	at java.base/java.util.EnumMap.entryHashCode(EnumMap.java:717)
	at java.base/java.util.EnumMap.hashCode(EnumMap.java:709)
	at java.base/java.util.Arrays.hashCode(Arrays.java:4498)
	at java.base/java.util.Objects.hash(Objects.java:133)
	at org.apache.lucene.search.BooleanQuery.computeHashCode(BooleanQuery.java:597)
	at org.apache.lucene.search.BooleanQuery.hashCode(BooleanQuery.java:611)
	at java.base/java.util.HashMap.hash(HashMap.java:340)
	at java.base/java.util.HashMap.put(HashMap.java:612)
	at org.apache.lucene.search.Multiset.add(Multiset.java:82)
	at org.apache.lucene.search.BooleanQuery.<init>(BooleanQuery.java:154)
	at org.apache.lucene.search.BooleanQuery.<init>(BooleanQuery.java:42)
	at org.apache.lucene.search.BooleanQuery$Builder.build(BooleanQuery.java:133)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl$1.run(NexusRepositoryIndexerImpl.java:1457)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.lambda$iterate$11(NexusRepositoryIndexerImpl.java:890)
	at org.netbeans.modules.openide.util.DefaultMutexImplementation.writeAccess(DefaultMutexImplementation.java:229)
	at org.openide.util.Mutex.writeAccess(Mutex.java:252)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.iterate(NexusRepositoryIndexerImpl.java:872)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.find(NexusRepositoryIndexerImpl.java:1387)
	at org.netbeans.modules.maven.indexer.NexusRepositoryIndexerImpl.find(NexusRepositoryIndexerImpl.java:1382)
	at org.netbeans.modules.maven.indexer.api.RepositoryQueries.lambda$findResult$13(RepositoryQueries.java:505)
	at org.netbeans.modules.maven.indexer.api.RepositoryQueries.getQueryResult(RepositoryQueries.java:217)
	at org.netbeans.modules.maven.indexer.api.RepositoryQueries.findResult(RepositoryQueries.java:502)
	at org.netbeans.modules.maven.nodes.AddDependencyPanel$QueryPanel$2.run(AddDependencyPanel.java:1144)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
(...)

JaroslavTulach · 2022-03-11T04:48:20Z

Maven continues to support JDK8 and even older. E.g. Maven itself must be using compatible version of Lucene. I suggest NetBeans to use the same version.

mbien · 2022-03-11T12:47:49Z

Maven continues to support JDK8 and even older. E.g. Maven itself must be using compatible version of Lucene. I suggest NetBeans to use the same version.

you mean maven-indexer? Thats exactly what this PR does. Latest 8.x is in use which is the same what maven-indexer 6.1x uses, Compatibility windows are described in the PR text and why this all had to be done in one step (5.x -> 8.x). The encountered problems are listed too.

The only potential showstopper remaining (IMO) is the discovered bug in lucene's hashcode logic, although it got quickly fixed thanks to lucene devs after I filed the issue, it doesn't really help us if it won't be backported to 8.x which we are stuck to due to the JDK 8 requirement of this module.

matthiasblaesing

In general looks good. A quick local test showed, that searching for dependencies (locally by class, remote by artifact/group name). I left a few inline comments though.

apisupport/maven.apisupport/nbproject/project.xml

matthiasblaesing · 2022-04-03T15:43:03Z

apisupport/maven.apisupport/src/org/netbeans/modules/maven/apisupport/NBMNativeMWI.java

@@ -247,7 +247,7 @@ public void performOperation(POMModel model) {
                //nbm-maven-plugin
                boolean addPlugin = true;
                String managedPVersion = null;
-                String pVersion = MavenNbModuleImpl.getLatestNbmPluginVersion();
+                String pVersion = MavenNbModuleImpl.LATEST_NBM_PLUGIN_VERSION;


Is the change in semantics intended? If I read the method correctly it will really fetch the latest version, while your change switches to a hard coded value. This looks fishy to me.

it is intended, Its this commit: 5b9efc2

explanation is here:
#3558 (comment)

short version:
code swallowed a NPE which basically made the tests test nothing, post upgrade the NPE did not occur and the tests tried to download the maven repo index which caused them to time out

by returning a constant (again, i basically reverted an older commit) and not ignoring the exception, everything works again.

Yes, semantics changed a little to the old behavior before 57e21b8

@oyarzun could you please have a look at this - it is your commit, for which the behavior is changed, so this needs to be reevaluated.

java/maven.indexer/src/org/apache/lucene/search/MultiTermQuery.java

java/maven.indexer/src/org/netbeans/modules/maven/indexer/ClassDependencyIndexCreator.java

java/maven.indexer/src/org/netbeans/modules/maven/indexer/NexusRepositoryIndexerImpl.java

java/maven.indexer/src/org/netbeans/modules/maven/indexer/ClassDependencyIndexCreator.java

mbien · 2022-04-11T14:34:45Z

@matthiasblaesing what is your opinion on this. This is a fairly mission critical area so we really should make sure that everything works before integrating IMO... but we have only a week left till freeze - would be great to get more reviews.

matthiasblaesing · 2022-04-19T19:48:10Z

@mbien sorry for the late reply: The outstanding question is the handling of the plugin version. Would it be possible to implement something like this:

Check if maven index is available
If maven index is available find the latest version and use that
else fallback to the hardcoded value

That way we have the best of both worlds.

apisupport/maven.apisupport/src/org/netbeans/modules/maven/apisupport/MavenNbModuleImpl.java

matthiasblaesing

I suggest to get this into master, once it settles down, the earlier, the long we have time to fix bugs ;-)

- added jdk/incubator to jdk class list test. - fix: move maven-indexer to the front in the classpath. - migration had to be done in one step since there are no maven-indexer releases available which support lucene 6 or 7.

lucene is case sensitive, maven-indexer however uses a lower case filter on its hardcoded NexusAnalyzer. This means that most class dependency queries wouldn't return anything. Base32 uses only one case (usually upper case, but we use lower case).

…nloaded. - query latest nbm-version but don't wait for the index download - this reverts some of 57e21b8 why did this work before migration? The code swallowed an exception during junit tests which caused the logic to return a fallback constant as version. Post migration, this exception does not occure and the method would correctly block -> tests time out.

- lambdas, diamonds, overrides, final fields, arm blocks - if chain over Strings -> switch - str.replaceAll -> str.replace for non-regex usages - map.contains + map.get -> map.get + null check - collection sizing where known - deprecations and warning removals - dead code removal - formatting fixes

mbien · 2022-04-24T17:01:53Z

ok awesome. Travis is working here too. I squashed a few less important commits, i would like to merge the rest without squashing so that it simplifies debugging with git bisections if problems occur.

mbien force-pushed the lucene-renovation branch from a6d54a7 to 086d6be Compare February 5, 2022 12:53

mbien changed the title ~~lucene renovation~~ maven indexing lucene renovation Feb 5, 2022

mbien force-pushed the lucene-renovation branch 2 times, most recently from 71170ed to f9fabe1 Compare February 11, 2022 16:45

mbien added Java [ci] enable extra Java tests (java.completion, java.source.base, java.hints, refactoring.java, form) Maven [ci] enable "build tools" tests Upgrade Library Library (Dependency) Upgrade labels Feb 11, 2022

mbien force-pushed the lucene-renovation branch from f9fabe1 to 98d4f33 Compare February 16, 2022 02:42

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mbien added the do not merge Don't merge this PR, it is not ready or just demonstration purposes. label Feb 20, 2022

mbien marked this pull request as ready for review February 20, 2022 12:39

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mbien force-pushed the lucene-renovation branch from a3e9997 to 04fa8fb Compare February 22, 2022 07:26

mbien commented Feb 22, 2022

View reviewed changes

added test for findVersionByClass().

f42aa43

mbien requested review from matthiasblaesing, lkishalmi, oyarzun, neilcsmith-net and sdedic April 3, 2022 06:29

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mbien added this to the NB14 milestone Apr 19, 2022

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neilcsmith-net modified the milestones: NB14, NB15 Apr 20, 2022

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mbien added 6 commits April 24, 2022 18:52

migrate maven repo indexer from lucene 5.x to 8.x.

656e520

- added jdk/incubator to jdk class list test. - fix: move maven-indexer to the front in the classpath. - migration had to be done in one step since there are no maven-indexer releases available which support lucene 6 or 7.

fix/workaround: avoid IndexOutOfBoundsException in maven-indexer.

9adf9ba

hack: backported LUCENE-10431 hashcode hotfix to EOL lucene 8.11.1.

35b41f6

mbien force-pushed the lucene-renovation branch from b4842a1 to ec298fb Compare April 24, 2022 16:58

mbien merged commit e315bc5 into apache:master Apr 24, 2022

mbien mentioned this pull request May 5, 2022

maven indexing: upgrade maven-indexer to 6.2.0 and remove workaround. #4077

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mbien mentioned this pull request Jul 26, 2022

Multi release jar support. #3860

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