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https://issues.apache.org/jira/browse/CALCITE-4393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17229998#comment-17229998
]
Ruben Q L commented on CALCITE-4393:
------------------------------------
{code:title=1) RexToLixTranslator.java}
/*90*/ public class RexToLixTranslator implements
RexVisitor<RexToLixTranslator.Result> {
/*91*/ public static final Map<Method, SqlOperator> JAVA_TO_SQL_METHOD_MAP =
/*92*/ Util.mapOf(
/*93*/ findMethod(String.class, "toUpperCase"),
SqlStdOperatorTable.UPPER,
// --> LOAD SqlStdOperatorTable
{code}
{code:title=2) SqlStdOperatorTable.java}
/*118*/ public static final SqlMultisetSetOperator MULTISET_UNION_DISTINCT =
/*119*/ new SqlMultisetSetOperator("MULTISET UNION DISTINCT", 14, false);
// --> LOAD SqlMultisetSetOperator
{code}
{code:title=3) SqlMultisetSetOperator.java}
/*42*/ public SqlMultisetSetOperator(String name, int prec, boolean all) {
/*43*/ super(
/*44*/ name,
/*45*/ SqlKind.OTHER,
/*46*/ prec,
/*47*/ true,
/*48*/ ReturnTypes.MULTISET_NULLABLE,
/*49*/ InferTypes.FIRST_KNOWN, // --> LOAD InferTypes
/*50*/ OperandTypes.MULTISET_MULTISET);
/*51*/ this.all = all;
/*52*/ }
{code}
{code:title=4) InferTypes.java}
/*41*/ public static final SqlOperandTypeInference FIRST_KNOWN =
/*42*/ (callBinding, returnType, operandTypes) -> {
/*43*/ final RelDataType unknownType =
/*44*/ callBinding.getValidator().getUnknownType();
/*45*/ RelDataType knownType = unknownType;
/*46*/ for (SqlNode operand : callBinding.operands()) {
/*47*/ knownType = SqlTypeUtil.deriveType(callBinding, operand);
/*48*/ if (!knownType.equals(unknownType)) {
/*49*/ break;
/*50*/ }
/*51*/ }
// --> LOAD SqlCallBinding
{code}
{code:title=5) SqlCallBinding.java}
/*59*/ private static final SqlCall DEFAULT_CALL =
/*60*/ SqlStdOperatorTable.DEFAULT.createCall(SqlParserPos.ZERO);
// SqlStdOperatorTable is still loading in 2)! SqlStdOperatorTable.DEFAULT in
SqlStdOperatorTable:185 is null => NPE!
{code}
> ExceptionInInitializerError due to NPE in SqlCallBinding caused by circular
> dependency
> --------------------------------------------------------------------------------------
>
> Key: CALCITE-4393
> URL: https://issues.apache.org/jira/browse/CALCITE-4393
> Project: Calcite
> Issue Type: Bug
> Reporter: Ruben Q L
> Assignee: Ruben Q L
> Priority: Major
> Fix For: 1.27.0
>
>
> See discussion here:
> https://lists.apache.org/thread.html/red0fc146f78a196af6fdaa5393b2c0906e0a49361a1734a850185777%40%3Cdev.calcite.apache.org%3E
> ExceptionInInitializerErroron WebSphere 9 (on Ubuntu) when trying to start an
> application that uses Calcite (shaded) library. The exception message reads:
> {noformat}
> ** error [-]: Unexpected error.
> ** ...
> ** Caused by: java.lang.BootstrapMethodError:
> java.lang.ExceptionInInitializerError
> **
> com.onwbp.org.apache.calcite.sql.type.InferTypes.<clinit>(InferTypes.java:41)
> **
> com.onwbp.org.apache.calcite.sql.fun.SqlMultisetSetOperator.<init>(SqlMultisetSetOperator.java:43)
> **
> com.onwbp.org.apache.calcite.sql.fun.SqlStdOperatorTable.<clinit>(SqlStdOperatorTable.java:118)
> **
> com.onwbp.org.apache.calcite.adapter.enumerable.RexToLixTranslator.<clinit>(RexToLixTranslator.java:93)
> ** java.lang.Class.forNameImpl(Native Method)
> ** java.lang.Class.forName(Class.java:348)
> **
> java.lang.invoke.MethodType.nonPrimitiveClassFromString(MethodType.java:311)
> **
> java.lang.invoke.MethodType.parseIntoClasses(MethodType.java:373)
> **
> java.lang.invoke.MethodType.fromMethodDescriptorString(MethodType.java:286)
> ** java.lang.invoke.MethodHandle.getCPMethodTypeAt(Native
> Method)
> **
> java.lang.invoke.MethodHandle.resolveInvokeDynamic(MethodHandle.java:849)
> ** ... 74 more
> ** Caused by: java.lang.ExceptionInInitializerError
> ** java.lang.J9VMInternals.ensureError(J9VMInternals.java:141)
> **
> java.lang.J9VMInternals.recordInitializationFailure(J9VMInternals.java:130)
> ** java.lang.Class.forNameImpl(Native Method)
> ** java.lang.Class.forName(Class.java:348)
> **
> java.lang.invoke.MethodType.nonPrimitiveClassFromString(MethodType.java:311)
> **
> java.lang.invoke.MethodType.parseIntoClasses(MethodType.java:373)
> **
> java.lang.invoke.MethodType.fromMethodDescriptorString(MethodType.java:286)
> ** java.lang.invoke.MethodHandle.getCPMethodTypeAt(Native
> Method)
> **
> java.lang.invoke.MethodHandle.resolveInvokeDynamic(MethodHandle.java:849)
> ** ... 85 more
> ** Caused by: java.lang.NullPointerException
> **
> com.onwbp.org.apache.calcite.sql.SqlCallBinding.<clinit>(SqlCallBinding.java:60)
> ** ... 92 more
> ****** 1 errors, 5 infos.
> {noformat}
> As we can see there is a NPE in
> [SqlCallBinding:60|https://github.com/apache/calcite/blob/2e9edae7fc57ab9c9c7c097008724ac99a1791a3/core/src/main/java/org/apache/calcite/sql/SqlCallBinding.java#L60],
> when it tries to call a method on {{SqlStdOperatorTable.DEFAULT}}, which
> seems to be null.
> According to the logs, what I think is happening is a circular dependency
> issue when classes get loaded (more details in first comment).
> However, so far I have only seen this error in WebSphere, in other
> environments the same application is correctly initialized and launched, and
> this exception does not happen.
> Since WebSphere uses IBM's own JVM, my hypothesis is that its class loader
> follows a different (and unlucky) order to load Calcite classes.
> So far I have not been able to reproduce the issue with a unit test, neither
> on [Github CI|https://github.com/apache/calcite/pull/2251], nor in a local
> environment.
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