异常No ManagedConnections available within configured blocking timeout

Posted 2020-07-12 飞鱼

Caused by: org.jboss.util.NestedSQLException: No ManagedConnections available within configured blocking timeout ( 30000 [ms] ); - nested throwable: (javax.resource.ResourceException: No ManagedConnections available within configured blocking timeout ( 30000 [ms] ))

 at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:107)

 at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:110)

 at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:76)

 ... 98 more

Caused by: javax.resource.ResourceException: No ManagedConnections available within configured blocking timeout ( 30000 [ms] )

 at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:246)

 at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:534)

 at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:395)

 at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:297)

 at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:447)

 at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:874)

 at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:103)

 ... 100 more

 

【问题现象】JBOSS 崩溃

 

【问题原因】

Caused by: javax.resource.ResourceException: No ManagedConnections available within configured blocking timeout ( 30000 [ms] )

通过异常从网上查了一下意思是：表示这个库连接数一直吃紧，或者连接超时，

查询条件拼接错误导致 SQL 一直查询数据库，

最终因积累的数据库处理太多，都在等待数据连接最终报错

 

 

整理了以下网上排查相关问题用到的SQL 

 

--正在执行的SQL

SELECT A.USERNAME, A.SID, B.SQL_TEXT, B.SQL_FULLTEXT

  FROM V$SESSION A, V$SQLAREA B

 WHERE A.SQL_ADDRESS = B.ADDRESS;

 

SELECT * FROM CUSTOMEREN;

 

--最近执行的 SQL 

SELECT B.SQL_TEXT, B.FIRST_LOAD_TIME, B.SQL_FULLTEXT

  FROM V$SQLAREA B

 WHERE B.FIRST_LOAD_TIME BETWEEN ‘2016-05-25/09:24:47‘ AND

       ‘2016-05-25/19:24:47‘

 ORDER BY B.FIRST_LOAD_TIME DESC;

 

--查找前十条性能差的SQL. 

SELECT *

  FROM (SELECT PARSING_USER_ID,

               EXECUTIONS,

               SORTS,

               COMMAND_TYPE,

               DISK_READS,

               SQL_TEXT

          FROM V$SQLAREA

         ORDER BY DISK_READS DESC)

 WHERE ROWNUM < 10;

 

--获取单次执行时间最长的10个SQL

SELECT SQL_ID, SQL_TEXT, ROUND(EXEC_TIME / 1000000, 0) EXEC_TIME

  FROM (SELECT SQL_ID,

               SQL_TEXT,

               EXEC_TIME,

               RANK() OVER(ORDER BY EXEC_TIME DESC) EXEC_RANK

          FROM (SELECT SQL_ID,

                       SQL_TEXT,

                       CPU_TIME,

                       ELAPSED_TIME,

                       EXECUTIONS,

                       ROUND(ELAPSED_TIME / EXECUTIONS, 0) EXEC_TIME

                  FROM V$SQL

                 WHERE EXECUTIONS > 1))

 WHERE EXEC_RANK <= 10;

 

 

--获取执行次数最多的10个SQL

SELECT SQL_TEXT, EXECUTIONS

  FROM (SELECT SQL_TEXT,

               EXECUTIONS,

               RANK() OVER(ORDER BY EXECUTIONS DESC) EXEC_RANK

          FROM V$SQL)

 WHERE EXEC_RANK <= 10;