Sito web scende - errori in mod_jk (apache + Tomcat) tronchi

Question

Sto avendo giù problema di tempo con il mio sito web. Ho apache + mod_jk + Tomcat 5.5 configurazione 2 su Linux Redhat. Proprio di recente iniziato ad avere il mio sito verso il basso una volta al giorno. Solo dopo il riavvio di Tomcat il sito web diventa di nuovo al normale.

log degli errori applicazione su Tomcat (mi dispiace, informazioni sulla privacy nascosto nei log):

2010-11-14 00:40:13,726 ERROR org.apache.catalina.core.StandardWrapperValve [invoke] - Servlet.service() for servlet action threw exception
java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:574)
    at ******.exchange.adapter.dispatcher.impl.XMLCommandDispatcher.sendCommand(XMLCommandDispatcher.java:109)
    at ******.exchange.adapter.star******.api.impl.******ApiImpl.******PricingAvailability(******ApiImpl.java:356)
    at ******.exchange.adapter.star******.impl.Concrete******GatewayImpl.find******Promotion(Concrete******GatewayImpl.java:123)
    at ******.exchange.service.impl.Concrete******ManagerImpl.find******Promotion(Concrete******ManagerImpl.java:199)
    at sun.reflect.GeneratedMethodAccessor1142.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:585)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:282)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:56)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
    at $Proxy16.find******Promotion(Unknown Source)
    at ******.ibe.servlet.crdms.search.******SearchPromotionServlet******.handleRequest(******SearchPromotionServlet******.java:75)
    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:44)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:595)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:543)
    at org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkServlet.java:390)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:341)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
    at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
    at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
    at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
    at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
    at java.lang.Thread.run(Thread.java:595)
2010-11-14 00:40:43,762 ERROR org.apache.catalina.core.ApplicationDispatcher [invoke] - Servlet.service() for servlet jsp threw exception
2010-11-14 00:40:43,805 ERROR org.apache.catalina.core.StandardWrapperValve [invoke] - Servlet.service() for servlet jsp threw exception
java.lang.OutOfMemoryError: unable to create new native thread
    at java.lang.Thread.start0(Native Method)
    at java.lang.Thread.start(Thread.java:574)
    at java.util.Timer.(Timer.java:154)
    at java.util.Timer.(Timer.java:122)
    at com.mysql.jdbc.Connection.(Connection.java:1441)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)
    at java.sql.DriverManager.getConnection(DriverManager.java:525)
    at java.sql.DriverManager.getConnection(DriverManager.java:171)
    at org.apache.jsp.frameset_005f******_005fbottom_005f1_jsp._jspService(frameset_005f******_005fbottom_005f1_jsp.java:88)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
    at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
    at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
    at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
    at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
    at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
    at java.lang.Thread.run(Thread.java:595)
2010-11-14 01:54:25,819 ERROR org.apache.catalina.core.ApplicationDispatcher [invoke] - Servlet.service() for servlet jsp threw exception

voci di registro Mod_JK al momento in cui si mette tomcat:

[Sun Nov 14 00:59:52 2010] [error] ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the response message from tomcat, network problems or tomcat is down (127.0.0.1:8009), err=-104
[Sun Nov 14 00:59:52 2010] [error] ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down or refused connection. No response has been sent to the client (yet)
[Sun Nov 14 01:00:01 2010] [error] ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the response message from tomcat, network problems or tomcat is down (127.0.0.1:8009), err=-104
[Sun Nov 14 01:00:01 2010] [error] ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down or refused connection. No response has been sent to the client (yet)
[Sun Nov 14 01:00:01 2010] [error] ajp_service::jk_ajp_common.c (1758): Error connecting to tomcat. Tomcat is probably not started or is listening on the wrong port. worker=worker1 failed
[Sun Nov 14 01:00:01 2010] worker1 mydomain.com 271.622400

[Sun Nov 14 01:00:01 2010] [error] ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the response message from tomcat, network problems or tomcat is down (127.0.0.1:8009), err=-104
[Sun Nov 14 01:00:01 2010] [error] ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down or refused connection. No response has been sent to the client (yet)
[Sun Nov 14 01:00:06 2010] [error] ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the response message from tomcat, network problems or tomcat is down (127.0.0.1:8009), err=-104
[Sun Nov 14 01:00:06 2010] [error] ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down or refused connection. No response has been sent to the client (yet)
[Sun Nov 14 01:00:06 2010] [error] ajp_service::jk_ajp_common.c (1758): Error connecting to tomcat. Tomcat is probably not started or is listening on the wrong port. worker=worker1 failed
[Sun Nov 14 01:00:06 2010] worker1 mydomain.com 86.999946

[Sun Nov 14 01:00:06 2010] [error] ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the response message from tomcat, network problems or tomcat is down (127.0.0.1:8009), err=-104
[Sun Nov 14 01:00:06 2010] [error] ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down or refused connection. No response has been sent to the client (yet)
[Sun Nov 14 01:00:10 2010] [error] ajp_connection_tcp_get_message::jk_ajp_common.c (961): Can't receive the response message from tomcat, network problems or tomcat is down (127.0.0.1:8009), err=-104
[Sun Nov 14 01:00:10 2010] [error] ajp_get_reply::jk_ajp_common.c (1503): Tomcat is down or refused connection. No response has been sent to the client (yet)
[Sun Nov 14 01:00:10 2010] [error] ajp_service::jk_ajp_common.c (1758): Error connecting to tomcat. Tomcat is probably not started or is listening on the wrong port. worker=worker1 failed
[Sun Nov 14 01:00:10 2010] worker1 mydomain.com 39.000187

Meesages in / var / log / messages:

Nov 14 00:59:40 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:00:47 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:01:49 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:02:54 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:04:03 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:05:06 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:06:13 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:07:14 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:08:15 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:09:19 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:10:23 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:11:29 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:12:29 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:13:29 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:14:56 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:16:04 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:17:19 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:18:22 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:19:26 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:20:26 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:21:36 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:22:37 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:23:48 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:24:50 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:25:54 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:26:57 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:29:08 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 01:30:10 nemo kernel: possible SYN flooding on port 8009. Sending cookies.
Nov 14 03:00:01 nemo setroubleshoot: SELinux is preventing mysqld (mysqld_t) "getattr" to /var/lib/mysql/mysql.sock (var_lib_t). For complete SELinux messages. run sea$
Nov 14 03:00:01 nemo setroubleshoot: SELinux is preventing mysqld (mysqld_t) "getattr" to /var/lib/mysql/nemo.me-tech.com.my.err (var_lib_t). For complete SELinux mess$
Nov 14 03:00:01 nemo setroubleshoot: SELinux is preventing mysqld (mysqld_t) "read" to ./time_zone_name.frm (var_lib_t). For complete SELinux messages. run sealert -l $

Apache conf:

# prefork MPM
# StartServers: number of server processes to start
# MinSpareServers: minimum number of server processes which are kept spare
# MaxSpareServers: maximum number of server processes which are kept spare
# MaxClients: maximum number of server processes allowed to start
# MaxRequestsPerChild: maximum number of requests a server process serves
 ‹IfModule prefork.c›
StartServers         5
MinSpareServers      5
MaxSpareServers     10
MaxClients          256
MaxRequestsPerChild  0
 ‹/IfModule›

# worker MPM
# StartServers: initial number of server processes to start
# MaxClients: maximum number of simultaneous client connections
# MinSpareThreads: minimum number of worker threads which are kept spare
# MaxSpareThreads: maximum number of worker threads which are kept spare
# ThreadsPerChild: constant number of worker threads in each server process
# MaxRequestsPerChild: maximum number of requests a server process serves
 ‹IfModule worker.c›
StartServers         2
MaxClients         256
MinSpareThreads     25
MaxSpareThreads     75
ThreadsPerChild     25
MaxRequestsPerChild  0
 ‹/IfModule›

worker.properties Apache mod_jk:

 worker.list=worker1
 worker.worker1.type=ajp13
 worker.worker1.host=127.0.0.1
 worker.worker1.port=8009
 worker.worker1.lbfactor=1
 worker.worker1.socket_keepalive=1
 worker.worker1.recycle_timeout=180
 worker.worker1.sticky_session=False

Tomcat server.xml (connettore AJP per mod_jk):

   ‹Connector className="org.apache.coyote.tomcat5.CoyoteConnector"
               port="8009"
               protocol="AJP/1.3"
               enableLookups="true"
               redirectPort="8443"
               acceptCount="10"
               debug="0"
               connectionTimeout="5000"
               useURIValidationHack="false"
               maxPostSize="10000000"
               maxThreads="256"
               maxSpareThreads="10"
               URIEncoding="UTF-8"
               protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/›

Qualsiasi aiuto o consiglio sarebbe molto apprezzato.

Grazie mille

Answer 1

questo si dovrebbe provare a impostare i vostri JAVA_OPTS variabile d'ambiente per ridurre la pila e / o dimensione heap utilizzato da Tomcat per dare al sistema operativo po 'di respiro.