Kenneth Knowles created BEAM-6558:
-------------------------------------
Summary: Beam SQL transitive dependencies appear incomplete /
broken
Key: BEAM-6558
URL: https://issues.apache.org/jira/browse/BEAM-6558
Project: Beam
Issue Type: Bug
Components: dsl-sql
Affects Versions: 2.9.0
Reporter: Kenneth Knowles
Assignee: Kenneth Knowles
Fix For: 2.10.0
Reporting on the dev list:
----
Hi, all,
Newbie here trying to figure out how to use published
beam-sdks-java-extensions-sql-2.9.0 in my own project.
I tried to create a gradle project to use BeamSQL sdk libraries. Here is the
build.gradle I have:
{code:java}
plugins {
id 'java'
}
group 'com.mycompany.myproject'
version '1.0-SNAPSHOT'
sourceCompatibility = 1.8
repositories {
mavenCentral()
}
apply plugin: 'java'
sourceSets.main.java.srcDirs = [
'src/main/java'
]
dependencies {
compile 'org.apache.beam:beam-sdks-java-core:2.9.0'
compile 'org.apache.beam:beam-sdks-java-extensions-sql:2.9.0'
compile 'com.google.code.findbugs:jsr305:3.0.2'
runtime 'org.apache.beam:beam-runners-direct-java:2.9.0'
testCompile group: 'junit', name: 'junit', version: '4.12'
}
// Run basic SQL example
task runBasicExample(type: JavaExec) {
description = "Run basic SQL example"
main = "com.mycompany.myproject.streamsql.examples.BeamSQLExample"
classpath = sourceSets.main.runtimeClasspath
args = ["--runner=DirectRunner"]
println classpath.getAsPath()
println args
}
{code}
The example BeamSQLExample is just copied from
[https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/example/BeamSqlExample.java].
I was able to compile the example in JDK8. However, when I tried to run it, I
hit the following exception:
{code:java}
Exception in thread "main" java.util.ServiceConfigurationError:
org.apache.beam.sdk.extensions.sql.impl.udf.BeamBuiltinFunctionProvider:
Provider org.apache.beam.sdk.extensions.sql.impl.udf.BuiltinStringFunctions
could not be instantiated
at java.util.ServiceLoader.fail(ServiceLoader.java:232)
at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
at
java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at
org.apache.beam.sdk.extensions.sql.impl.BeamSqlEnv.loadBeamBuiltinFunctions(BeamSqlEnv.java:128)
at
org.apache.beam.sdk.extensions.sql.SqlTransform.expand(SqlTransform.java:94)
at
org.apache.beam.sdk.extensions.sql.SqlTransform.expand(SqlTransform.java:76)
at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:537)
at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:471)
at org.apache.beam.sdk.values.PCollection.apply(PCollection.java:357)
at
com.mycompany.myprject.streamsql.examples.BeamSQLExample.main(BeamSQLExample.java:72)
Caused by: java.lang.NoClassDefFoundError:
org/apache/commons/codec/DecoderException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at
java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 9 more
Caused by: java.lang.ClassNotFoundException:
org.apache.commons.codec.DecoderException
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 14 more
{code}
When I traced into the code, it turns out that the failure occurs when the
classloader tries to get the default constructor w/o any parameters for
BuiltinStringFunctions.class. I double checked my local gradle cache and
confirmed that the jar is there:
{code:java}
SJCMAC91THJHD4:beamsql-demo ypan$ ls -l
~/.gradle/caches/modules-2/files-2.1/org.apache.beam/beam-sdks-java-extensions-sql/2.9.0/67e7675519859ff332619c4c6ea5d26a505dbd50/beam-sdks-java-extensions-sql-2.9.0.jar
-rw-r--r-- 1 ypan 192360288 12761025 Jan 29 18:02
/Users/ypan/.gradle/caches/modules-2/files-2.1/org.apache.beam/beam-sdks-java-extensions-sql/2.9.0/67e7675519859ff332619c4c6ea5d26a505dbd50/beam-sdks-java-extensions-sql-2.9.0.jar
{code}
I also have tried to compile the sql sdk libraries in Beam's source repo and
just copying over the generated class files over to my runtime classpath.
Apparently, that did not work well since there are many shadowed libraries now
need explicit declaring dependencies. I tried to search for an example of maven
or gradle dependency declaration that users will use to create their own
application using the SQL SDKs but was not lucky enough to find one.
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