每个测试套件中的第一次测试都无法连接到DB

时间：2011-09-05 07:16:57

标签： oracle ant jdbc junit hudson

我们运行的是2000多个junit，大多数测试使用jdbc调用连接到Oracle数据库。由于某些原因，我们遇到的问题是很少有无法连接到数据库的测试。以下是一些背景知识：

  • 我们正在CI服务器中运行测试 - Jenkins
  • ANT使用<junit>
    • fork="true"任务进行测试
  • 只有少数测试因Could not connect to database错误而失败，它不一致，有时会失败，有时则不然。
  • 失败的测试通常是每个测试套件中的第一个测试
  • 其他连接到db的测试也不会失败。

到目前为止，我们没有运气解决它。 有人遇到过类似的东西吗？

这是一个堆栈跟踪：

Error Message

Could not connect to database using the connect string jdbc:oracle:thin:R71/R71@abc.def:1521:DB11g
Stacktrace

java.lang.RuntimeException: Could not connect to database using the connect string jdbc:oracle:thin:R71/R71@abc.def:1521:DB11g
    at com.abc.common.dao.JDBCUtils.getThinConnection(JDBCUtils.java:257)
    at com.abc.common.dao.JDBCUtils.getConnection(JDBCUtils.java:115)
    at com.abc.common.dao.JDBCUtils.queryForInt(JDBCUtils.java:714)
    at com.abc.test.utils.MetaDataLanguageDBTest.testMetaDataLanguages(MetaDataLanguageDBTest.java:13)
Caused by: java.sql.SQLRecoverableException: IO Error: Connection reset
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:428)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:536)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:228)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
    at java.sql.DriverManager.getConnection(DriverManager.java:582)
    at java.sql.DriverManager.getConnection(DriverManager.java:207)
    at com.abc.common.dao.JDBCUtils.getThinConnection(JDBCUtils.java:254)
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
    at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
    at oracle.net.ns.DataPacket.send(DataPacket.java:199)
    at oracle.net.ns.NetOutputStream.flush(NetOutputStream.java:211)
    at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:227)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:175)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:100)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:85)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:123)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:79)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1122)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:1099)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:288)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:191)
    at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:366)
    at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:752)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:366)
Standard Error

java.sql.SQLRecoverableException: IO Error: Connection reset
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:428)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:536)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:228)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
    at java.sql.DriverManager.getConnection(DriverManager.java:582)
    at java.sql.DriverManager.getConnection(DriverManager.java:207)
    at com.abc.common.dao.JDBCUtils.getThinConnection(JDBCUtils.java:254)
    at com.abc.common.dao.JDBCUtils.getConnection(JDBCUtils.java:115)
    at com.abc.common.dao.JDBCUtils.queryForInt(JDBCUtils.java:714)
    at com.abc.test.utils.MetaDataLanguageDBTest.testMetaDataLanguages(MetaDataLanguageDBTest.java:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at junit.framework.TestCase.runTest(TestCase.java:154)
    at junit.framework.TestCase.runBare(TestCase.java:127)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at junit.framework.TestSuite.runTest(TestSuite.java:208)
    at junit.framework.TestSuite.run(TestSuite.java:203)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:421)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:912)
    at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:766)
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
    at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
    at oracle.net.ns.DataPacket.send(DataPacket.java:199)
    at oracle.net.ns.NetOutputStream.flush(NetOutputStream.java:211)
    at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:227)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:175)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:100)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:85)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:123)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:79)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1122)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:1099)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:288)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:191)
    at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:366)
    at oracle.jdbc.driver.T4CTTIoauthenticate.doOAUTH(T4CTTIoauthenticate.java:752)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:366)
    ... 25 more

感谢。

2 个答案:

答案 0 :(得分：1)

我知道这个问题超级老了，但我遇到了同样的问题。我的解决方案是将以下环境变量添加到我的测试中：

-Djava.security.egd=file:///dev/urandom

简而言之，Oracle JDBC驱动程序默认使用/dev/random，如果系统上没有足够的熵，则可以阻止它。完整的解释可以在this answer。

中找到

答案 1 :(得分：0)

可能是你的连接不足。我会尝试使用由连接池支持的DataSource。

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