Julian Hyde created CALCITE-1694:
------------------------------------

             Summary: Clash in protobuf versions between Avatica and Hadoop
                 Key: CALCITE-1694
                 URL: https://issues.apache.org/jira/browse/CALCITE-1694
             Project: Calcite
          Issue Type: Bug
          Components: avatica, pig-adapter
            Reporter: Julian Hyde


When running Pig adapter tests, we get the following stack:

{noformat}
ava.lang.NoClassDefFoundError: com/google/protobuf/GeneratedMessageV3

        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:455)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:367)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at 
org.apache.calcite.avatica.ConnectionPropertiesImpl.<clinit>(ConnectionPropertiesImpl.java:37)
        at org.apache.calcite.avatica.MetaImpl.<init>(MetaImpl.java:71)
        at 
org.apache.calcite.jdbc.CalciteMetaImpl.<init>(CalciteMetaImpl.java:82)
        at org.apache.calcite.jdbc.Driver.createMeta(Driver.java:169)
        at 
org.apache.calcite.avatica.AvaticaConnection.<init>(AvaticaConnection.java:118)
        at 
org.apache.calcite.jdbc.CalciteConnectionImpl.<init>(CalciteConnectionImpl.java:113)
        at 
org.apache.calcite.jdbc.CalciteJdbc41Factory$CalciteJdbc41Connection.<init>(CalciteJdbc41Factory.java:114)
        at 
org.apache.calcite.jdbc.CalciteJdbc41Factory.newConnection(CalciteJdbc41Factory.java:59)
        at 
org.apache.calcite.jdbc.CalciteJdbc41Factory.newConnection(CalciteJdbc41Factory.java:44)
        at 
org.apache.calcite.jdbc.CalciteFactory.newConnection(CalciteFactory.java:53)
        at 
org.apache.calcite.avatica.UnregisteredDriver.connect(UnregisteredDriver.java:143)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at 
org.apache.calcite.test.CalciteAssert$MapConnectionFactory.createConnection(CalciteAssert.java:1151)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.createConnection(CalciteAssert.java:1189)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1260)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.explainMatches(CalciteAssert.java:1350)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.explainContains(CalciteAssert.java:1345)
        at 
org.apache.calcite.test.PigAdapterTest.testImplWithGroupByMultipleFields(PigAdapterTest.java:116)
        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:483)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
        at 
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
        at 
com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
        at 
com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
        at 
com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
        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:483)
        at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: 
com.google.protobuf.GeneratedMessageV3
        at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        ... 58 more
{noformat}

followed by

{noformat}

java.lang.NoClassDefFoundError: Could not initialize class 
org.apache.calcite.avatica.ConnectionPropertiesImpl

        at org.apache.calcite.avatica.MetaImpl.<init>(MetaImpl.java:71)
        at 
org.apache.calcite.jdbc.CalciteMetaImpl.<init>(CalciteMetaImpl.java:82)
        at org.apache.calcite.jdbc.Driver.createMeta(Driver.java:169)
        at 
org.apache.calcite.avatica.AvaticaConnection.<init>(AvaticaConnection.java:118)
        at 
org.apache.calcite.jdbc.CalciteConnectionImpl.<init>(CalciteConnectionImpl.java:113)
        at 
org.apache.calcite.jdbc.CalciteJdbc41Factory$CalciteJdbc41Connection.<init>(CalciteJdbc41Factory.java:114)
        at 
org.apache.calcite.jdbc.CalciteJdbc41Factory.newConnection(CalciteJdbc41Factory.java:59)
        at 
org.apache.calcite.jdbc.CalciteJdbc41Factory.newConnection(CalciteJdbc41Factory.java:44)
        at 
org.apache.calcite.jdbc.CalciteFactory.newConnection(CalciteFactory.java:53)
        at 
org.apache.calcite.avatica.UnregisteredDriver.connect(UnregisteredDriver.java:143)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at 
org.apache.calcite.test.CalciteAssert$MapConnectionFactory.createConnection(CalciteAssert.java:1151)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.createConnection(CalciteAssert.java:1189)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1260)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.explainMatches(CalciteAssert.java:1350)
        at 
org.apache.calcite.test.CalciteAssert$AssertQuery.explainContains(CalciteAssert.java:1345)
        at 
org.apache.calcite.test.PigAdapterTest.testImplWithMultipleFilters(PigAdapterTest.java:59)
        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:483)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
        at 
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
        at 
com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
        at 
com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
        at 
com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
        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:483)
        at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
{noformat}

If you explicitly load {{ConnectionPropertiesImpl}} by adding the line

{code}
Util.discard(org.apache.calcite.avatica.ConnectionPropertiesImpl.class);
{code}

to {{PigSchemaFactory}} the error goes away.

I think the problem might be that the Pig adapter pulls in Pig, which pulls in 
Hadoop, which depends on protobuf 2, whereas Avatica's 
{{ConnectionPropertiesImpl}} has some members that depend on protobuf 3.

We can work around by having the Pig adapter load Calcite's {{MetaImpl}} 
(thereby avoiding an explicit dependency of the Pig adapter on Avatica).

But the real solution, I think, is too reduce the dependencies of 
{{ConnectionPropertiesImpl}}. Calcite (and other Avatica users) do not care 
about the protobuf implementation of Avatica's wire protocol, but protobuf gets 
loaded due to the {{fromProto(Common.ConnectionProperties)}} method.

[~elserj], What do you think?



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