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从我的应用程序中，许多线程正试图从 oracle 获得连接，但我看到一次只有一个线程能够获得连接。在此线程获得连接之前，其他线程被阻塞，这导致应用程序运行缓慢。我需要帮助确定其他线程被阻塞的原因。我的连接数是否比池中的可用连接数少？

持有锁的线程。

org.apache.commons.dbcp2.managed.LocalXAConnectionFactory.createConnection(LocalXAConnectionFactory.java:68)
    at org.apache.commons.dbcp2.managed.PoolableManagedConnectionFactory.makeObject(PoolableManagedConnectionFactory.java:64)

- locked <0x0000000641e88660> (a org.apache.commons.dbcp2.managed.PoolableManagedConnectionFactory)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
    at org.apache.commons.dbcp2.managed.ManagedConnection.updateTransactionStatus(ManagedConnection.java:125)
    at org.apache.commons.dbcp2.managed.ManagedConnection.<init>(ManagedConnection.java:59)
    at org.apache.commons.dbcp2.managed.ManagedDataSource.getConnection(ManagedDataSource.java:81)
    at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1413)
    at com.manh.jdbc.ScopeDataSource.getConnection(ScopeDataSource.java:79)


Thread waiting for lock on PoolableManagedConnectionFactory

"pool-38-thread-5389" #267084 prio=5 os_prio=0 tid=0x00002b6b66541800 nid=0x18dcf waiting for monitor entry [0x00002b6bfd047000]
   java.lang.Thread.State: BLOCKED (on object monitor)
    at org.apache.commons.dbcp2.managed.PoolableManagedConnectionFactory.makeObject(PoolableManagedConnectionFactory.java:64)
    - waiting to lock <0x0000000641e88660> (a org.apache.commons.dbcp2.managed.PoolableManagedConnectionFactory)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:868)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
    at org.apache.commons.dbcp2.managed.ManagedConnection.updateTransactionStatus(ManagedConnection.java:125)
    at org.apache.commons.dbcp2.managed.ManagedConnection.<init>(ManagedConnection.java:59)
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