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[英]Java (JDBC) : Alternatives for iteration of query results [ while(resultSet.next()) ]
[英]ResultSet.next() hung while talking to oracle 11.2 using jdbc
我們有一個使用jdbc與oracle 11.2對話的java應用程序。 我們正在使用oracle-jdbc-7.jar
Created-By: 20.12-b01 (Sun Microsystems Inc.)
Implementation-Vendor: Oracle Corporation
Implementation-Title: JDBC
Implementation-Version: 12.1.0.1.0
我們也使用Statement.setQueryTimeout()
但是,每隔幾天,在執行ResultSet.next()時,與oracle交談的線程就會掛起。
代碼如下所示:
PreparedStatement ps = createPreparedStatement();
ps.setQueryTimeout(60);
while (true) {
ps.executeQuery();
//iterate over the ResultSet doing ResultSet.next() continuously
//do something with the ResultSet
//sleep for 1 second.
}
Threaddump:
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:152)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at oracle.net.ns.Packet.receive(Packet.java:311)
at oracle.net.ns.DataPacket.receive(DataPacket.java:105)
at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:305)
at oracle.net.ns.NetInputStream.read(NetInputStream.java:249)
at oracle.net.ns.NetInputStream.read(NetInputStream.java:171)
at oracle.net.ns.NetInputStream.read(NetInputStream.java:89)
at oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:123)
at oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:79)
at oracle.jdbc.driver.T4CMAREngineStream.unmarshalUB1(T4CMAREngineStream.java:426)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:390)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:249)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:566)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:215)
at oracle.jdbc.driver.T4CPreparedStatement.fetch(T4CPreparedStatement.java:1022)
at oracle.jdbc.driver.OracleStatement.fetchMoreRows(OracleStatement.java:3590)
at oracle.jdbc.driver.InsensitiveScrollableResultSet.fetchMoreRows(InsensitiveScrollableResultSet.java:1008)
at oracle.jdbc.driver.InsensitiveScrollableResultSet.absoluteInternal(InsensitiveScrollableResultSet.java:972)
at oracle.jdbc.driver.InsensitiveScrollableResultSet.next(InsensitiveScrollableResultSet.java:572)
- locked <0x00000000d0873738> (a oracle.jdbc.driver.T4CConnection)
任何解決這個問題的想法都會受到贊賞嗎?
我們嘗試過使用openjdk7和oracle的JDK 7,但它沒有幫助。
謝謝。
嘗試找到阻止會話。
SELECT
s.blocking_session,
s.sid,
s.serial#,
s.seconds_in_wait
FROM
v$session s
WHERE
blocking_session IS NOT NULL
如果是您的會話,那么您的查詢可能需要優化。 否則會引起其他問題。
PS:我不是SQL專家
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