我有一个java刮板,它产生大约1,500-2,100个线程,每个线程通过jdbc连接到同一个数据库,并进行插入。这些线程非常频繁地插入。
当连接太多时,数据库似乎会崩溃。当所有线程都失去连接时,我总是可以生成210个线程或连接。下面是在服务器端生成的日志消息。
2015-07-15 20:18:37 UTC [10825-21] LOG: checkpointer process (PID 13435) was terminated by signal 9: Killed
2015-07-15 20:18:37 UTC [10825-22] LOG: terminating any ot
在我的生产服务器上遇到问题。JVM一次又一次地崩溃。出现下面的致命错误。崩溃的点总是不同的。JVM内存相关信息附加为Pic。 #
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f5cf7bc3de0, pid=29662, tid=0x00007f5cd4ef6700
#
# JRE version: Java(TM) SE Runtime Environment (8.0_231-b11) (build 1.8.0_231-b11)
# J
我有一个两个节点的Cassandra集群(版本: 3.10)。我试图从SQL中读取数据并写入Cassandra。一切都还好,但总有一天我犯了个错误-
Exception in thread "main" com.datastax.driver.core.exceptions.TransportException: [/192.168.22.231:9042] Connection has been closed
at com.datastax.driver.core.exceptions.TransportException.copy(TransportExce
我让Jenkins在我的服务器上运行,通过webhooks与GitHub连接。不幸的是,我的构建偶尔会失败,我不知道为什么。有时重启Jenkins (sudo service jenkins restart)可以解决问题,但有时不能。服务器运行Ubuntu16.04nad Nginx作为代理。是什么导致了这个问题?我该如何解决它?
Started by GitHub push by gaboratorium
Building in workspace /var/lib/jenkins/workspace/kudos.gaboratorium.com
[WS-CLEANUP] Deleting
提前谢谢。请帮助我解决下面提到的kafka错误。
00000000000000.txnindex and rebuilding index... (kafka.log.Log)
[2018-09-25 12:48:05,462] ERROR There was an error in one of the threads during logs loading: java.lang.InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code (kafka.log
后端代码:
public class MyServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/plain");
resp.getWriter().println("Please use the form to POST to this url");}
@Override
pub
我一直在试着演我的戏!Cloud9集成开发环境上的项目。然而,它在start之前就一直在杀死activator
tabdulradi@my-project:~/workspace (master) $ ./activator
[info] Loading project definition from /home/ubuntu/workspace/project
[info] Set current project to my-project (in build file:/home/ubuntu/workspace/)
[my-project] $ start -Dhttp.port=808
我试图在eclipse上从我的tomcat服务器上运行两个单独的项目。它将单独运行,但当我尝试同时运行它们时,它将不会启动,并在控制台上打印如下内容:
Exception in thread "main"
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"
我做了一些实验,通过使用eclipse开始增加我的堆:
eclipse.exe -vmargs -Xms512m -Xmx512m -XX:Pe
我有一个服务器(Ubuntu14.04.4LTS),并且希望某个Java应用程序能够一直在上面运行。目前,我使用nohup gradle run &启动它。昨天它停止工作了。nohup.out显示了以下错误消息:
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':run'.
> Process 'command '/usr/lib/jvm/java-8-oracle/bin/java'' finished
我无法使用独立的eclipse内存分析器或visualVM打开堆转储。我已经尝试了两个不同的hprof文件。VisualVM在加载堆转储时挂起,eclipse内存分析器给出了下面的错误。
Error opening heap dump 'java_pid15751.hprof'. Check the error log for further details.
Error opening heap dump 'java_pid15751.hprof'. Check the error log for further details.
Not a HPRO