Question

我正在使用apache cassandra服务器。经过一段时间后，我的cassandra服务停止了。当我尝试使用centOS7使用“ service cassandra status”检查其状态时，它显示以下日志

[centos@ip-172-31-24-101 routes]$ service cassandra status

cassandra.service - LSB: distributed storage system for structured data
   Loaded: loaded (/etc/rc.d/init.d/cassandra; bad; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2018-12-31 10:26:13 UTC; 34min ago
     Docs: man:systemd-sysv-generator(8)
Main PID: 2078 (code=killed, signal=KILL)

Dec 31 05:12:46 ip-172-31-24-101.ap-south-1.compute.internal su[781]: (to cassandra) root on none

Dec 31 05:12:49 ip-172-31-24-101.ap-south-1.compute.internal cassandra[761]: Starting Cassandra: OK

Dec 31 05:12:49 ip-172-31-24-101.ap-south-1.compute.internal systemd[1]: Started LSB: distributed storage system for structured data.

Dec 31 10:25:46 ip-172-31-24-101.ap-south-1.compute.internal systemd[1]: cassandra.service: main process exited, code=killed, s...KILL

Dec 31 10:25:47 ip-172-31-24-101.ap-south-1.compute.internal su[15760]: (to cassandra) root on none

Dec 31 10:25:47 ip-172-31-24-101.ap-south-1.compute.internal cassandra[15746]: Shutdown Cassandra: bash: line 0: kill: (2078) - ...ess

Dec 31 10:26:13 ip-172-31-24-101.ap-south-1.compute.internal cassandra[15746]: ERROR: could not stop cassandra

Dec 31 10:26:13 ip-172-31-24-101.ap-south-1.compute.internal systemd[1]: cassandra.service: control process exited, code=exited...us=1

Dec 31 10:26:13 ip-172-31-24-101.ap-south-1.compute.internal systemd[1]: Unit cassandra.service entered failed state.

Dec 31 10:26:13 ip-172-31-24-101.ap-south-1.compute.internal systemd[1]: cassandra.service failed."

我如何找出Cassandra的问题所在？为什么会崩溃？

Answer 1

被SIGKILL杀死的进程通常是Linux的“ OOM Killer”的结果-当内存不足时，该进程将杀死进程（例如，参见 https://unix.stackexchange.com/questions/136291/will-linux-start-killing-my-processes-without-asking-me-if-memory-gets-short/136294，了解有关OOM Killer的更多详细信息。

这可能表明您为Cassandra分配了过多的内存（用于堆和堆），没有足够的交换空间，或两者都没有。如果是杀死了Cassandra的OOM杀手，则应该能够在通常的位置（dmesg，/ var / log / messages，journalctl，取决于您的分布）中找到日志消息。消息如下所示：

[   54.125380] Out of memory: Kill process 8320 (cassandra) score 324 or sacrifice child
[   54.125382] Killed process 8320 (cassandra) total-vm:1309660kB, anon-rss:1287796kB, file-rss:76kB

Answer 2

我建议您查看一下Cassandra进程的system.log，因为它可以指出问题所在。取决于是从软件包中安装C *还是从tarball中安装C *，这取决于它的位置。软件包安装的默认值为/ var / log / cassandra，而tarball的默认值为install_directory / log / cassandra（对此不乐观）。

卡桑德拉进程被操作系统杀死

2 个答案: