[show] java.lang.OutOfMemoryError: unable to create new native thread

java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:640)
	at com.bitmechanic.util.JavaAlarm.<init>(JavaAlarm.java:17)
	at com.bitmechanic.sql.ConnectionPool.closeConnection(ConnectionPool.java:353)
	at com.bitmechanic.sql.ConnectionPool.removeConnection(ConnectionPool.java:319)
	at com.bitmechanic.sql.ConnectionPool.returnConnection(ConnectionPool.java:479)
	at com.bitmechanic.sql.PooledConnection.close(PooledConnection.java:202)
	at com.vizensoft.pool.DBConnectionManager.freeConnection(DBConnectionManager.java:97)
	at com.vizensoft.board.NewConsultMgr.selectBoardData(NewConsultMgr.java:1102)
	at _jsp._counsel3._adive._read__jsp._jspService(counsel3/adive/read.jsp:188)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:436)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)
	at java.lang.Thread.run(Thread.java:662)