java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack

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    Oracle intermittently throws “ORA-12516, TNS:listener could not find available handler with matching protocol stack”

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    java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack
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    java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack
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    Oracle intermittently throws "ORA-12516, TNS:listener could not find available handler with matching protocol stack"

    Database Administrators | 1 year ago | Vlad Mihalcea
    java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack
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    java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack
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    java.sql.SQLException: Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack

  1. wendellpereira 2 times, last 3 months ago
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Root Cause Analysis

  1. java.sql.SQLException

    Listener refused the connection with the following error: ORA-12516, TNS:listener could not find available handler with matching protocol stack

    at oracle.jdbc.driver.T4CConnection.logon()
  2. Oracle jdbc
    OracleDataSource.getConnection
    1. oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    2. oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    3. oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    4. oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    5. oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    6. oracle.jdbc.pool.OracleDataSource.getPhysicalConnection(OracleDataSource.java:280)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    7. oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:207)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    8. oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:157)[ojdbc6-11.2.0.4.jar:11.2.0.4.0]
    8 frames
  3. com.vladmihalcea.book
    OracleConnectionCallTest.test
    1. com.vladmihalcea.book.high_performance_java_persistence.jdbc.connection.OracleConnectionCallTest.test(OracleConnectionCallTest.java:57)[test-classes/:na]
    1 frame