- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
好吧,自从过去三天以来,我一直在徒劳地敲我的脑袋,所以是时候和专家一起讨论了!
背景
我试图让一个看似简单的设置工作——我有一个 CentOS 盒子,我想在上面设置两个 JBoss 节点(即单个非多宿主服务器上的两个节点),并尝试失败-结束场景。我读到 Apache 的 mod_jk 模块可以帮助我实现它。
我努力尝试关注JBoss 5.1 Clustering Guide , 但不知何故,我似乎在某个地方摸索了。
问题
我永远无法连接到 node2
通过 Apache,并始终收到 503 Service Unavailable 消息。
配置
以下是详细信息。
CentOS 6Apache 2.2.15mod_jk 1.2.35JBoss 5.1.0 GA
<strong>httpd.conf</strong>
最后有以下行:
#Include mod_jk's specific configuration fileInclude conf/mod_jk.conf
<strong>mod_jk.conf</strong>
包含以下行(除其他外):
JkMountFile conf/uriworkermap.properties
<strong>uriworkermap.properites</strong>
看起来像这样:
# Simple worker configuration file# Mount the Servlet context to the ajp13 worker/jmx-console=loadbalancer/jmx-console/*=loadbalancer/web-console=loadbalancer/web-console/*=loadbalancer/jspHello=loadbalancer/jspHello/*=loadbalancer
<strong>workers.properties</strong>
:
# Define list of workers that will be used# for mapping requestsworker.list=loadbalancer,status# Define Node1# modify the host as your host IP or DNS name.worker.node1.port=8009worker.node1.host=127.0.0.1worker.node1.type=ajp13worker.node1.lbfactor=1# Define Node2# modify the host as your host IP or DNS name.worker.node2.port=8109worker.node2.host=127.0.0.1worker.node2.type=ajp13worker.node2.lbfactor=1# Load-balancing behaviourworker.loadbalancer.type=lbworker.loadbalancer.balance_workers=node1,node2worker.loadbalancer.sticky_session=1# Status worker for managing load balancerworker.status.type=status
我使用以下命令调用 node1
和 node2
:
./run.sh -c node1 -g DocsPartition -Djboss.messaging.ServerPeerID=1 -Djboss.service.binding.set=ports-default -b 0.0.0.0./run.sh -c node2 -g DocsPartition -Djboss.messaging.ServerPeerID=2 -Djboss.service.binding.set=ports-01 -b 0.0.0.0
另外,我修改了server.xml
每个 node
中的文件目录并添加相应的jvmRoute
Engine
中的参数标签。
观察
以下是 mod_jk
日志:
最初当我调出 node1、node2 和 httpd 时
...[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] do_shm_open::jk_shm.c (561): Truncated shared memory to 1856[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] do_shm_open::jk_shm.c (606): Initialized shared memory /var/run/httpd/mod_jk.shm.14695 size=1856 free=1728 addr=0x7fe7cb7c3000[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] do_shm_open_lock::jk_shm.c (476): Opened shared memory lock /var/run/httpd/mod_jk.shm.14695.lock[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'ServerRoot' -> '/etc/httpd'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.list' -> 'loadbalancer,status'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node1.port' -> '8009'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node1.host' -> '127.0.0.1'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node1.type' -> 'ajp13'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node1.lbfactor' -> '1'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node2.port' -> '8109'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node2.host' -> '127.0.0.1'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node2.type' -> 'ajp13'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.node2.lbfactor' -> '1'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.loadbalancer.type' -> 'lb'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.loadbalancer.balance_workers' -> 'node1,node2'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.loadbalancer.sticky_session' -> '0'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_map_dump::jk_map.c (589): Dump of map: 'worker.status.type' -> 'status'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] build_worker_map::jk_worker.c (241): creating worker loadbalancer[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (145): about to create instance loadbalancer of lb[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (158): about to validate and init loadbalancer[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (145): about to create instance node1 of ajp13[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (158): about to validate and init node1[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_validate::jk_ajp_common.c (2679): worker node1 contact is '127.0.0.1:8009'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2877): setting endpoint options:[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2880): keepalive: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2884): socket timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2888): socket connect timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2892): buffer size: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2896): pool timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2900): ping timeout: 10000[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2904): connect timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2908): reply timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2912): prepost timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2916): recovery options: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2920): retries: 2[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2924): max packet size: 8192[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2928): retry interval: 100[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_create_endpoint_cache::jk_ajp_common.c (2737): setting connection pool size to 1 with min 1 and acquire timeout 200[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (145): about to create instance node2 of ajp13[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (158): about to validate and init node2[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_validate::jk_ajp_common.c (2679): worker node2 contact is '127.0.0.1:8109'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2877): setting endpoint options:[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2880): keepalive: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2884): socket timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2888): socket connect timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2892): buffer size: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2896): pool timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2900): ping timeout: 10000[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2904): connect timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2908): reply timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2912): prepost timeout: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2916): recovery options: 0[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2920): retries: 2[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2924): max packet size: 8192[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_init::jk_ajp_common.c (2928): retry interval: 100[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] ajp_create_endpoint_cache::jk_ajp_common.c (2737): setting connection pool size to 1 with min 1 and acquire timeout 200[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] validate::jk_lb_worker.c (1702): Balanced worker 0 has name node1 and route node1 in domain [Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] validate::jk_lb_worker.c (1702): Balanced worker 1 has name node2 and route node2 in domain [Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] update_mult::jk_lb_worker.c (262): worker node1 gets multiplicity 1[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] update_mult::jk_lb_worker.c (262): worker node2 gets multiplicity 1[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] jk_lb_push::jk_lb_worker.c (353): syncing shm for lb 'loadbalancer' from mem (0->1)[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] build_worker_map::jk_worker.c (241): creating worker status[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (145): about to create instance status of status[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] wc_create_worker::jk_worker.c (158): about to validate and init status[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] init::jk_status.c (5078): Status worker 'status' is read/write and has css '(null)', prefix 'worker', name space 'jk:', xml name space 'xmlns:jk="http://tomcat.apache.org"', document type '(null)'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [debug] init::jk_status.c (5129): Status worker 'status' has good rating for '0000000f' and bad rating for '00ff1010'[Thu Sep 06 02:21:54 2012][14695:140633527957472] [info] init_jk::mod_jk.c (3365): mod_jk/1.2.35 initialized...
当我尝试访问该应用程序时
...[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] find_match::jk_uri_worker_map.c (949): Found a wildchar match '/jspHello/*=loadbalancer'[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_handler::mod_jk.c (2621): Into handler jakarta-servlet worker=loadbalancer r->proxyreq=0[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] wc_get_worker_for_name::jk_worker.c (115): found a worker loadbalancer[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] wc_maintain::jk_worker.c (338): Maintaining worker loadbalancer[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] wc_get_name_for_type::jk_worker.c (292): Found worker type 'lb'[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] init_ws_service::mod_jk.c (1097): Service protocol=HTTP/1.1 method=GET ssl=false host=(null) addr=::1 name=localhost port=80 auth=(null) user=(null) laddr=::1 raddr=::1 uri=/jspHello/[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] service::jk_lb_worker.c (1192): service sticky_session=0 id='empty'[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] get_most_suitable_worker::jk_lb_worker.c (1061): found best worker node2 (node2) using method 'Request'[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] service::jk_lb_worker.c (1237): service worker=node2 route=node2[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_get_endpoint::jk_ajp_common.c (3146): acquired connection pool slot=0 after 0 retries[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_marshal_into_msgb::jk_ajp_common.c (626): ajp marshaling done[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_service::jk_ajp_common.c (2441): processing node2 with 2 retries[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_send_request::jk_ajp_common.c (1615): (node2) all endpoints are disconnected.[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (485): socket TCP_NODELAY set to On[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (609): trying to connect socket 14 to 127.0.0.1:8109[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] jk_open_socket::jk_connect.c (627): connect to 127.0.0.1:8109 failed (errno=13)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] ajp_connect_to_endpoint::jk_ajp_common.c (992): Failed opening socket to (127.0.0.1:8109) (errno=13)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [error] ajp_send_request::jk_ajp_common.c (1621): (node2) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=13)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] ajp_service::jk_ajp_common.c (2614): (node2) sending request to tomcat failed (recoverable), because of error during request sending (attempt=1)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_service::jk_ajp_common.c (2463): retry 1, sleeping for 100 ms before retrying[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_send_request::jk_ajp_common.c (1615): (node2) all endpoints are disconnected.[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (485): socket TCP_NODELAY set to On[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (609): trying to connect socket 14 to 127.0.0.1:8109[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] jk_open_socket::jk_connect.c (627): connect to 127.0.0.1:8109 failed (errno=13)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] ajp_connect_to_endpoint::jk_ajp_common.c (992): Failed opening socket to (127.0.0.1:8109) (errno=13)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [error] ajp_send_request::jk_ajp_common.c (1621): (node2) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=13)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] ajp_service::jk_ajp_common.c (2614): (node2) sending request to tomcat failed (recoverable), because of error during request sending (attempt=2)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [error] ajp_service::jk_ajp_common.c (2634): (node2) connecting to tomcat failed.[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_reset_endpoint::jk_ajp_common.c (786): (node2) resetting endpoint with socket -1 (socket shutdown)[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_done::jk_ajp_common.c (3077): recycling connection pool for worker node2 and socket -1[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] service::jk_lb_worker.c (1455): worker node2 escalating local error to global error[Thu Sep 06 02:24:42 2012][14700:140633527957472] [info] service::jk_lb_worker.c (1469): service failed, worker node2 is in error state[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] service::jk_lb_worker.c (1480): recoverable error... will try to recover on other worker[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] get_most_suitable_worker::jk_lb_worker.c (1061): found best worker node1 (node1) using method 'Request'[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] service::jk_lb_worker.c (1237): service worker=node1 route=node2[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_get_endpoint::jk_ajp_common.c (3146): acquired connection pool slot=0 after 0 retries[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_marshal_into_msgb::jk_ajp_common.c (626): ajp marshaling done[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_service::jk_ajp_common.c (2441): processing node1 with 2 retries[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_send_request::jk_ajp_common.c (1615): (node1) all endpoints are disconnected.[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (485): socket TCP_NODELAY set to On[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (609): trying to connect socket 14 to 127.0.0.1:8009[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] jk_open_socket::jk_connect.c (635): socket 14 [127.0.0.1:38909 -> 127.0.0.1:8009] connected[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_connection_tcp_send_message::jk_ajp_common.c (1175): sending to ajp13 pos=4 len=570 max=8192[Thu Sep 06 02:24:42 2012][14700:140633527957472] [debug] ajp_connection_tcp_send_message::jk_ajp_common.c (1175): 0000 12 34 02 36 02 02 00 08 48 54 54 50 2F 31 2E 31 - .4.6....HTTP/1.1...
如您所见,在通过节点 1 处理请求之前,它尝试连接到节点 2 两次。到现在都是这样node1
起来了。我一取下它,就在尝试访问时开始收到 503 错误。
我不确定它是否是 mod_jk
问题还是我遗漏了什么。
有什么建议吗?
更新:它与两个独立的(物理)节点一起工作,但我仍然无法让它在具有不同端口(8009 和 8109)的同一个盒子上工作。
最佳答案
听起来 JBoss 没有使用您认为的端口。一个好的诊断工具是 lsof(可通过 yum 安装);
lsof -i -n -P
并查看 JBoss 进程正在监听哪些端口。从那里更正您的配置。
关于Apache、mod_jk 和 JBoss 负载平衡问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12289761/
在 Web 应用程序架构设计期间,我必须从概念上计算我的服务器之一可以服务多少个当前客户端。然后我可以预算它。 那么,有什么公式可以遵循吗?或者,你如何计算这个?或者,通常,一个 httpd/tomc
关闭。这个问题不符合Stack Overflow guidelines .它目前不接受答案。 要求我们推荐或查找书籍、工具、软件库、教程或其他场外资源的问题对于 Stack Overflow 来说是
我正在使用 Angular 5,我正在尝试在加载 div 的背景图像时获取加载图标。 如果它是一个普通的 img,我对此没有问题,但如果我尝试将它作为背景,它就不起作用。 这里是一些示例代码 app.
我们怎么知道我们的程序在 CPU 上有多少负载? 我尝试使用 htop 找到它。但是 htop 不会给 cpu 负载。它实际上给出了我程序的 cpu 利用率(使用 pid)。 我正在使用 C 编程,L
我们发现从Spark 1.3到当前的Spark 2.0.1以来,从Oracle数据库使用Spark的API加载数据一直很慢。典型的代码在Java中是这样的: Map options =
我有时会收到 mnesia overloaded主要使用时的错误消息 async_dirty查询和 ram_copies表。所以为了了解发生了什么,我想获得更多关于 mnesia 状态的信息,例如每秒
对于通常使用很少 CPU 的程序来说,内核 CPU 非常高。 Linux 机器在状态之间交替。大多数时候,程序使用低 CPU 正常执行。在 CPU“激增”期间,程序使用 100% 可用 CPU 使用高
我正在使用 Raspberry Pi 2 来路由 wifi-eth 连接。因此,从 eth 方面来看,我有一台可以使用 Pi wifi 连接到互联网的计算机。在 Raspberry 上我启动 htop
基本上我有一个网页,其中有一个 iframe 可以从不同的域加载另一个网页。它移动得很慢,我想证明整个页面很慢只是因为 iframe 内的页面。 有什么方法可以测量总页面负载以及总页面负载中有多少%来
我们有一个基于 Spring 的应用程序,它充当使用其他 Rest API 的编排层。我只想测试这个组件的性能,而不测试正在使用的下游 api。 我正在寻找有关如何完成此操作的任何架构建议? 当前的方
我正在学习 hibernate 。为了进行测试,我使用无效 key 调用了 session.load 。当我在调试器(JB Idea)中跨过该行后,没有任何反应 - 我预计会得到 ObjectNotF
我正在开发一个小型的待办事项 PHP 应用程序。我正在使用 jQuery 构建 HTML。其中一个是一个按钮,用于启动一个模式,允许用户编辑该项目。我很好奇加载数据时更好的方法是什么: 1) 在初始加
我尝试在 twitch 播放器中使用 angular 作为覆盖标记。 我将 ng-repear 与(键,值)结合使用。 //player is here 设置是一个全局对象。但是当我尝试加载页面
我即将了解 C 语言中的特定进程如何在特定时间范围内加载 CPU。该进程可能会在运行时切换处理器核心,因此我也需要处理这个问题。 CPU为ARM处理器。 我研究了从标准顶部获取负载的不同方法,perf
这个问题在这里已经有了答案: XMLHttpRequest Origin null is not allowed Access-Control-Allow-Origin for file:/// t
您好,我正在用 Java 开发负载平衡算法。在我的系统中将有一个主节点和 n 个从节点。主节点将接收查询分发给它的从节点。但是在将查询分发到其从节点之一之前,我想测量从节点中的当前负载,以检查特定从节
我正在渲染由大约 50 万个三角形组成的相当重的对象。我使用 opengl 显示列表,在渲染方法中只调用 glCallList。我认为一旦图形基元被编译成显示列表,cpu 的工作就完成了,它只是告诉
我正在尝试加密 Sipdroid,为此我必须在 RTP 数据包获得编码的音频负载后对其进行加密。我在 RTP 数据包类中使用这个函数: public byte[] getPayload() {
我正在尝试解析以下 JSON 负载: { "results":[ [ 298.648132, 280.68692, 356.54
在动画期间 cpu 负载非常高(高达 75%) 是否有优化代码以降低 CPU 负载的方法? 我的代码: ImageView myImageView = (ImageView)findViewById(
我是一名优秀的程序员,十分优秀!