Re: Issue with PSQL JDBC Driver Null Pointer

[Dave Cramer <davecramer@postgres.rocks>]

On Thu, 29 Jul 2021 at 11:04, Bhavesh Mistry <bhavesh.mistry13@xxxxxxxxx> wrote:

Hello,

I am getting an NPE exception in the JDBC driver 42.2.23. 

When the alias is null, NPE results.  Is it possible to handle null value ? I have filled a bug against RCA https://github.com/vladmihalcea/hibernate-types/issues/335.  But, I thought that PSQL Driver can handle it more gracefully.

Caused by: java.lang.NullPointerException: null
        at org.postgresql.jdbc.TypeInfoCache.getTypeForAlias(TypeInfoCache.java:675)
        at org.postgresql.jdbc.TypeInfoCache.getPGArrayType(TypeInfoCache.java:519)
        at org.postgresql.jdbc.PgConnection.createArrayOf(PgConnection.java:1375)
        at org.postgresql.jdbc.PgConnection.createArrayOf(PgConnection.java:1399)
        at org.apache.commons.dbcp2.DelegatingConnection.createArrayOf(DelegatingConnection.java:827)
        at org.apache.commons.dbcp2.DelegatingConnection.createArrayOf(DelegatingConnection.java:827)
        at org.apache.commons.dbcp2.DelegatingConnection.createArrayOf(DelegatingConnection.java:827)
        at com.vladmihalcea.hibernate.type.array.internal.ArraySqlTypeDescriptor$1.doBind(ArraySqlTypeDescriptor.java:36)
        at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:73)
        at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:276)
        at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:271)
        at org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:39)
        at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2995)
        at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3292)
        at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3828)
        at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:107)
        at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
        at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478)
        at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:684)
        at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:475)
        at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:348)
        at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:40)
        at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:102)
        at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1362)
        at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:453)
        at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3212)
        at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2380)
        at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:447)
        at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183)
        at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40)
        at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281)
        at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101)
        ... 123 common frames omitted

public String getTypeForAlias(String alias) {
    String type = typeAliases.get(alias);
    if (type != null) {
      return type;
    }
    if (alias.indexOf('"') == -1) {   // THIS LINE THROWS NPE SINCE alias is null ** 
      type = typeAliases.get(alias.toLowerCase());
      if (type != null) {
        return type;
      }
    }
    return alias;
  }

It would appear that improv: type alias handling in TypeInfoCache by bokken · Pull Request #1986 · pgjdbc/pgjdbc (github.com)

should be backpatched into 42.2.24 which should solve this problem

Thanks,

Dave 

--

Thanks,

Bhavesh