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我在Redhat上有apache 2 + mod_jk + tomcat安裝。剛剛開始有java.lang.OutOfMemoryError：無法創建新的本地線程異常會導致tomcat掛起。我的網站在tomcat的內存不足異常
catalina.sh：
JAVA_OPTS="-Xms1256m -Xmx2000m" export JAVA_OPTS CATALINA_OPTS="-Xms1024m -Xmx2000m" export CATALINA_OPTS JAVA_HOME=/data/app/jdk/jdk1.5.0_11 JRE_HOME=/data/app/jdk/jdk1.5.0_11 export JAVA_HOME export JRE_HOME
是內存設置是否正確？我有4GM可用RAM。
Tomcat的錯誤日誌：
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)
mod_jk的時刻當Tomcat下來的日誌條目：
[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在/ var/log/messages中：
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 $
阿帕奇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›
的Apache mod_jk的worker.properties：
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
的Tomcat的server.xml（AJP連接器的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"/›
任何幫助或建議將不勝感激。
非常感謝