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  1. MariaDB Connector/J
  2. CONJ-661

Intermittent NullPointerException in prepareStatement

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 2.3.0
    • Fix Version/s: None
    • Component/s: aurora, Failover
    • Labels:
      None
    • Environment:
      Amazon Linux
      Java 8
      Groovy 2.5.2

      Description

      I believe the fix for this issue is likely similar to these two commits that were made for CONJ-616:

      We are connecting to an AWS Aurora RDS datasource using a connection string that looks like this:
      jdbc:mariadb:aurora://XXXXX.cluster-XXXXX.us-east-1.rds.amazonaws.com:3306/XXXXX?socketTimeout=0&useSSL=true&connectTimeout=31000

      After connecting successfully, we are occasionally getting this NullPointerException on calls to prepareStatement:

      java.lang.NullPointerException: null
            at org.mariadb.jdbc.internal.failover.impl.MastersSlavesListener.noBackslashEscapes(MastersSlavesListener.java:294)
            at org.mariadb.jdbc.internal.failover.FailoverProxy.invoke(FailoverProxy.java:158)
            at com.sun.proxy.$Proxy18.noBackslashEscapes(Unknown Source)
            at org.mariadb.jdbc.MariaDbConnection.internalPrepareStatement(MariaDbConnection.java:535)
            at org.mariadb.jdbc.MariaDbConnection.prepareStatement(MariaDbConnection.java:350)
            at groovy.sql.Sql$CreatePreparedStatementCommand.execute(Sql.java:4604)
            at groovy.sql.Sql$CreatePreparedStatementCommand.execute(Sql.java:4582)
            at groovy.sql.Sql.getAbstractStatement(Sql.java:4421)
            at groovy.sql.Sql.getPreparedStatement(Sql.java:4436)
            at groovy.sql.Sql.getPreparedStatement(Sql.java:4525)
            at groovy.sql.Sql.eachRow(Sql.java:1282)
            at groovy.sql.Sql.eachRow(Sql.java:1376)
            at groovy.sql.Sql.eachRow(Sql.java:1435)
            at groovy.sql.Sql$eachRow.call(Unknown Source)
      

      In this instance, our input into Groovy's eachRow method was:
      sql: "SELECT table_name FROM information_schema.tables where table_schema=current_database() and lower(table_name)=?"
      params: ["connection_data"]
      closure: irrelevant, we weren't getting far enough into execution for the code to hit this parameter

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            Assignee:
            diego dupin Diego Dupin
            Reporter:
            joseph.witthuhn Joseph Witthuhn
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              Dates

              Created:
              Updated:

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