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  1. MariaDB Connector/J
  2. CONJ-661

Intermittent NullPointerException in prepareStatement

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 2.3.0
    • 2.7.13
    • aurora, Failover
    • None
    • 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

      Attachments

        Activity

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          joseph.witthuhn Joseph Witthuhn created issue -
          joseph.witthuhn Joseph Witthuhn made changes -
          Field Original Value New Value
          Description I believe the fix for this issue is likely similar to these two commits that were made for CONJ-616:
          * https://github.com/MariaDB/mariadb-connector-j/commit/a4fe8a6584eb0bc7b9e3a2cbb8d2944aae8760ff#diff-a20a8f2ac5655c0096cb43b49262e501
          * https://github.com/MariaDB/mariadb-connector-j/commit/0013ee923a70ca012be42b82fd8d2c75c3ff2ec1#diff-a20a8f2ac5655c0096cb43b49262e501

          We are connecting to an AWS Aurora RDS datasource using a connection string that looks like this:
          jdbc:mariadb:aurora://XXXXX.cluster-XXXXX.eu-west-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:
          {noformat}
          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)
          {noformat}

          In this instance, here was 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_
          		I believe the fix for this issue is likely similar to these two commits that were made for CONJ-616:
          * https://github.com/MariaDB/mariadb-connector-j/commit/a4fe8a6584eb0bc7b9e3a2cbb8d2944aae8760ff#diff-a20a8f2ac5655c0096cb43b49262e501
          * https://github.com/MariaDB/mariadb-connector-j/commit/0013ee923a70ca012be42b82fd8d2c75c3ff2ec1#diff-a20a8f2ac5655c0096cb43b49262e501

          We are connecting to an AWS Aurora RDS datasource using a connection string that looks like this:
          jdbc:mariadb:aurora://XXXXX.cluster-XXXXX.eu-west-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:
          {noformat}
          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)
          {noformat}

          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_
          joseph.witthuhn Joseph Witthuhn made changes -
          Description I believe the fix for this issue is likely similar to these two commits that were made for CONJ-616:
          * https://github.com/MariaDB/mariadb-connector-j/commit/a4fe8a6584eb0bc7b9e3a2cbb8d2944aae8760ff#diff-a20a8f2ac5655c0096cb43b49262e501
          * https://github.com/MariaDB/mariadb-connector-j/commit/0013ee923a70ca012be42b82fd8d2c75c3ff2ec1#diff-a20a8f2ac5655c0096cb43b49262e501

          We are connecting to an AWS Aurora RDS datasource using a connection string that looks like this:
          jdbc:mariadb:aurora://XXXXX.cluster-XXXXX.eu-west-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:
          {noformat}
          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)
          {noformat}

          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_
          		I believe the fix for this issue is likely similar to these two commits that were made for CONJ-616:
          * https://github.com/MariaDB/mariadb-connector-j/commit/a4fe8a6584eb0bc7b9e3a2cbb8d2944aae8760ff#diff-a20a8f2ac5655c0096cb43b49262e501
          * https://github.com/MariaDB/mariadb-connector-j/commit/0013ee923a70ca012be42b82fd8d2c75c3ff2ec1#diff-a20a8f2ac5655c0096cb43b49262e501

          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:
          {noformat}
          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)
          {noformat}

          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_
          diego dupin Diego Dupin made changes -
          Component/s aurora [ 14008 ]
          serg Sergei Golubchik made changes -
          Workflow MariaDB v3 [ 90718 ] MariaDB v4 [ 134630 ]
          diego dupin Diego Dupin made changes -
          Fix Version/s 2.7.13 [ 29803 ]
          diego dupin Diego Dupin added a comment -

          long time after, but seen the rare case when it can occurs

          diego dupin Diego Dupin added a comment - long time after, but seen the rare case when it can occurs
          diego dupin Diego Dupin made changes -
          Resolution Fixed [ 1 ]
          Status Open [ 1 ] Closed [ 6 ]

          People

            diego dupin Diego Dupin
            joseph.witthuhn Joseph Witthuhn
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            Dates

              Created:
              Updated:
              Resolved:

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