Ebean ClassPathScanner scanning entire driver

[Tian Jie]

Hi, 

I'm trying to set up ebean in a legacy codebase, after I changed the pom, I wrote a simple class to run ebean, it seems ebean is scanning entire E driver, and got a NPE .

Any ideas? 

Thanks.

13:39:51.050 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner - determining location urls for classpath: using ClassLoader java.net.URLClassLoader@b0649f3 ...

13:39:51.051 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner - scanning URL: file:/E:/projects/#EBEAN_PROJECT#/target/classes/

13:39:51.056 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning starting at classpath root in filesystem: E:\projects\#EBEAN_PROJECT#\target\classes\

...

13:39:53.354 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\projects\#EBEAN_PROJECT#\xxx\xxx ()

13:39:53.355 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\projects\#EBEAN_PROJECT#\xxx\yyy ()

13:39:53.361 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner - scanning URL: file:/

13:39:53.363 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning starting at classpath root in filesystem: E:\

13:39:53.363 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\ ()

13:39:53.364 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\$RECYCLE.BIN ()

13:39:53.364 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\$RECYCLE.BIN\S-1-5-21-1812419434-266073208-705020799-500 ()

.....

.....

.....

.....

13:40:37.358 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\projects\#OTHER_PROJECTS#\\src\test ()

13:40:37.358 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\projects\#OTHER_PROJECTS#\\src\test\java ()

13:40:37.359 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\projects\#OTHER_PROJECTS#\\src\test\java\org ()

13:40:37.359 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\projects\#OTHER_PROJECTS#\\src\test\java\org\foo ()

13:40:38.015 [com.example.EbeanDemo.main()] DEBUG org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner - Scanning for resources in path: E:\System Volume Information ()

[WARNING] 

java.lang.reflect.InvocationTargetException

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:497)

at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)

at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.RuntimeException: Error in classpath search (looking for entities etc)

at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.getBootupClasses(BootupClassPathSearch.java:68)

at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.search(BootupClassPathSearch.java:31)

at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses1(DefaultContainer.java:230)

at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses(DefaultContainer.java:203)

at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:100)

at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:44)

at io.ebean.EbeanServerFactory.createInternal(EbeanServerFactory.java:108)

at io.ebean.EbeanServerFactory.create(EbeanServerFactory.java:67)

at com.example.EbeanDemo.main(EbeanDemo.java:57)

... 6 more

Caused by: java.lang.NullPointerException

at org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner.findResourceNamesFromFileSystem(FileSystemClassPathLocationScanner.java:67)

at org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner.findResourceNamesFromFileSystem(FileSystemClassPathLocationScanner.java:72)

at org.avaje.classpath.scanner.internal.scanner.classpath.FileSystemClassPathLocationScanner.findResourceNames(FileSystemClassPathLocationScanner.java:47)

at org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner.findResourceNames(ClassPathScanner.java:166)

at org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner.scanForClasses(ClassPathScanner.java:104)

at org.avaje.classpath.scanner.Scanner.scanForClasses(Scanner.java:86)

at org.avaje.classpath.scanner.Scanner.scanForClasses(Scanner.java:98)

at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.getBootupClasses(BootupClassPathSearch.java:59)

... 14 more

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 52.444 s

[INFO] Finished at: 2017-09-08T13:40:38+08:00

[INFO] Final Memory: 26M/555M

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project core: An exception occured while executing the Java class. null: InvocationTargetException: Error in classpath search (looking for entities etc): NullPointerException -> [Help 1]

[ERROR] 

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR] 

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

13:40:38.452 [Thread-1] DEBUG io.ebeaninternal.server.lib.ShutdownManager - Shutting down

[Rob Bygrave]

Ah interesting.  That looks like a bug there in FileSystemClassPathLocationScanner.java:67 ... so yes, I'll have a look to fix that.

Note that we can define a ebean.mf manifest file in src/main/resources to restrict/specify what packages to scan for enhancement. 

For example: https://github.com/ebean-orm-examples/example-java8/blob/master/src/main/resources/ebean.mf

entity-packages: org.example.domain
transactional-packages: org.example
querybean-packages: org.example

If we are not using @Transactional or Query beans we can use the value none to mean do not scan/enhance for that. For example:

entity-packages: org.example.domain
transactional-packages: org.example
querybean-packages: none

Cheers, Rob.

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[Rob Bygrave]

https://github.com/avaje-common/avaje-classpath-scanner/issues/5

[Rob Bygrave]

Fixed in 10.4.5

Reference https://github.com/ebean-orm/ebean/issues/1120

[Tian Jie]

Hi, thanks for the quick fix.

I still don't understand why in my project it's scanning the entire E driver (and it's very slow). 

I write a basicly the same test based on the example-minimal project, and I removed the ebean.mf, ebean only scaning the project's directory.

Is there anything I'm missing?

Best regards,

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[Rob Bygrave]

> Is there anything I'm missing?

Not that I am aware.  I note you are on windows but otherwise not sure.  You might be able to use the debugger to determine what is going on there?

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[Tian Jie]

On Tuesday, September 12, 2017 at 4:29:03 PM UTC+8, Rob Bygrave wrote:

> Is there anything I'm missing?

Not that I am aware.  I note you are on windows but otherwise not sure.  You might be able to use the debugger to determine what is going on there?

org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner#getLocationUrlsForPath line:203

Enumeration<URL> urls = classLoader.getResources(location.getPath());

Here, one project urls.size is 1（"file:/E:/project_path/） another is 2 ("file:/E:/project_path/ and "file:/" ）

Haven't find out why yet.

[Tian Jie]

Some jar's ill formatted MANIFEST.MF caused this problem.

For my case is https://mvnrepository.com/artifact/batik/batik/1.5

Manifest-Version: 1.0

Ant-Version: Apache Ant 1.5.2 

Created-By: 1.3.1_07-b02 (Sun Microsystems Inc.)

Implementation-Title: Batik All Jar

Implementation-Version: 1.5

Implementation-Vendor: Apache Software Foundation (http://xml.apache.o

 rg/batik/)

Main-Class: org.apache.batik.apps.svgbrowser.Main

Class-Path: lib/batik-ext.jar \           lib/batik-dom.jar \         

   lib/batik-css.jar \           lib/batik-svg-dom.jar \           lib

 /batik-gvt.jar \           lib/batik-parser.jar \           lib/batik

 -script.jar \           lib/batik-bridge.jar \           lib/batik-sw

 ing.jar \           lib/batik-transcoder.jar \           lib/batik-gu

 i-util.jar \           lib/batik-awt-util.jar \           lib/batik-u

 til.jar \           lib/batik-root.jar \           lib/batik-svggen.j

 ar \           lib/batik-xml.jar \           batik-squiggle.jar \    

        batik-rasterizer.jar \           batik-pp.jar \           lib/

 xerces_2_3_0.jar \           lib/xml-apis.jar \           lib/pdf-tra

 nscoder.jar \           lib/js.jar

seems those "\" become "file:/" when loading this jar in URLClassPath.getLoader

https://github.com/frohoff/jdk8u-jdk/blob/master/src/share/classes/sun/misc/URLClassPath.java#L495

[Thibault Meyer]

Hello Rob,

I still have this issue when I try to use a second server.

Ebean.getServer("toto").find(AccountModel.class).where().findOne();

val EbeanVersion = "11.8.1"
val EbeanAgentVersion = "11.5.1"
val EbeanDBMigrationVersion = "11.2.1"

"C:\Program Files\Java\jdk1.8.0_162\bin\java" -Xms512M -Xmx1024M -Xss1M -XX:+CMSClassUnloadingEnabled -javaagent:C:\Users\thiba\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\173.4301.25\lib\idea_rt.jar=52907:C:\Users\thiba\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\173.4301.25\bin -Dfile.encoding=windows-1252 -classpath "C:\Program Files (x86)\sbt\bin\sbt-launch.jar" xsbt.boot.Boot run
[info] Loading settings from idea.sbt ...
[info] Loading global plugins from C:\Users\thiba\.sbt\1.0\plugins
[info] Loading settings from plugins.sbt ...
[info] Loading project definition from C:\Users\thiba\Documents\Programmation\stationski\station-api\project
[info] Loading settings from build.sbt,version.sbt ...
[info] Set current project to station-api (in build file:/C:/Users/thiba/Documents/Programmation/stationski/station-api/)


--- (Running the application, auto-reloading is enabled) ---


[info] p.c.s.AkkaHttpServer - Listening for HTTP on /0:0:0:0:0:0:0:0:9000


(Server started, use Enter to stop and go back to the console...)


[info] application - Creating Pool for datasource 'toto'
[info] c.z.h.HikariDataSource - HikariPool-1 - Starting...
[info] c.z.h.HikariDataSource - HikariPool-1 - Start completed.
[info] p.a.d.DefaultDBApi - Database [toto] connected at jdbc:postgresql://127.0.0.1/db?autoReconnect=true&ApplicationName=test2
[info] application - Creating Pool for datasource 'default'
[info] c.z.h.HikariDataSource - HikariPool-2 - Starting...
[info] c.z.h.HikariDataSource - HikariPool-2 - Start completed.
[info] p.a.d.DefaultDBApi - Database [default] connected at jdbc:postgresql://127.0.0.1/db?autoReconnect=true&ApplicationName=test1
[info] a.e.s.Slf4jLogger - Slf4jLogger started
[info] i.e.m.MigrationRunner - local migrations:4  existing migrations:4  checkState:true

[warn] comm.event - Can't initialize Event module: Connection refused: connect
[info] c.z.p.m.r.PlayRedis - Redis connected at redis://127.0.0.1:6379
[info] play.api.Play - Application started (Dev)
[error] application - Fatal error on GET /healthcheck called by 127.0.0.1
java.util.concurrent.CompletionException: java.lang.RuntimeException: Error in classpath search (looking for entities etc)
 at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
 at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
 at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
 at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
 at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
 at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
 at scala.concurrent.java8.FuturesConvertersImpl$CF.apply(FutureConvertersImpl.scala:21)
 at scala.concurrent.java8.FuturesConvertersImpl$CF.apply(FutureConvertersImpl.scala:18)
 at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
 at scala.concurrent.BatchingExecutor$Batch.processBatch$1(BatchingExecutor.scala:63)

Caused by: java.lang.RuntimeException: Error in classpath search (looking for entities etc)

 at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.getBootupClasses(BootupClassPathSearch.java:69)
 at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.search(BootupClassPathSearch.java:29)
 at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses1(DefaultContainer.java:246)
 at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses(DefaultContainer.java:219)
 at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:112)
 at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:91)
 at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:46)
 at io.ebean.EbeanServerFactory.create(EbeanServerFactory.java:54)
 at io.ebean.Ebean$ServerManager.getWithCreate(Ebean.java:203)
 at io.ebean.Ebean$ServerManager.get(Ebean.java:190)
Caused by: org.avaje.classpath.scanner.core.ClassPathScanException: java.lang.ClassNotFoundException: ErrorHandler$1
 at org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner.scanForClasses(ClassPathScanner.java:128)
 at org.avaje.classpath.scanner.core.Scanner.scanForClasses(Scanner.java:89)
 at org.avaje.classpath.scanner.core.Scanner.scanForClasses(Scanner.java:101)
 at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.getBootupClasses(BootupClassPathSearch.java:60)
 at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.search(BootupClassPathSearch.java:29)
 at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses1(DefaultContainer.java:246)
 at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses(DefaultContainer.java:219)
 at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:112)
 at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:91)
 at io.ebeaninternal.server.core.DefaultContainer.createServer(DefaultContainer.java:46)
Caused by: java.lang.ClassNotFoundException: ErrorHandler$1
 at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
 at org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner.scanForClasses(ClassPathScanner.java:110)
 at org.avaje.classpath.scanner.core.Scanner.scanForClasses(Scanner.java:89)
 at org.avaje.classpath.scanner.core.Scanner.scanForClasses(Scanner.java:101)
 at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.getBootupClasses(BootupClassPathSearch.java:60)
 at io.ebeaninternal.server.core.bootup.BootupClassPathSearch.search(BootupClassPathSearch.java:29)
 at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses1(DefaultContainer.java:246)
 at io.ebeaninternal.server.core.DefaultContainer.getBootupClasses(DefaultContainer.java:219)

[Rob Bygrave]

Ok (different problem to the original post I see -  Caused by: java.lang.ClassNotFoundException: ErrorHandler$1) 

I see on line 115 of org.avaje.classpath.scanner.internal.scanner.classpath.ClassPathScanner it catches NoClassDefFoundError

... could catch ClassNotFoundException and that would fix that issue I'd say.





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[Rob Bygrave]

I have released avaje-classpath-scanner version 2.2.6 ... and this has the catch of ClassNotFound moved such that it isn't fatal.

Try that ...  (add that dependency, replacing the existing version).

Cheers, Rob.