Ambari BigInsights Kafka未启动

Question

看起来我的第一个问题是我的BigInsights图像，这不是一个大问题，但需要思考一下。在我的Ambari浏览器服务页面上，显示Kafka服务没有运行，我多次尝试重启，但似乎一直失败。所以我想我最好再深入研究一下。在这种情况下，问题出在Ambari Master服务器上，该服务器上运行的服务最多。因此，行动的第一个要求是看看Ambari是否没有正确地进行调用：

[root@master ~]# kafka
Usage: /usr/bin/kafka {start|stop|status|clean}
[root@master ~]# kafka status
Kafka is not running.
[root@master ~]# kafka start
Starting Kafka succeeded with PID=15815.
[root@master ~]# kafka status
Kafka is not running.

接下来，我尝试了一个干净的开始，并不是我认为它会有很大的不同，但可能是日志有问题，不允许它重新启动：

[root@master ~]# kafka clean
Removed the Kafka PID file: /var/run/kafka/kafka.pid.
Removed the Kafka OUT file: /var/log/kafka/kafka.out.
Removed the Kafka ERR file: /var/log/kafka/kafka.err.
[root@master ~]# kafka status
Kafka is not running. No pid file found.
[root@master ~]# kafka start
Starting Kafka succeeded with PID=15875.
[root@master-01 ~]# kafka status
Kafka is not running.

Answer 1

因此，让我们适当地查看一下日志：

[root@master ~]# ls -ltr /var/log/kafka/
-<cut>-
-rw-r--r-- 1 kafka hadoop  6588 Aug 11 13:55 controller.log.2015-08-11-13
-rw-r--r-- 1 kafka hadoop  6000 Aug 11 13:59 server.log.2015-08-11-13
-rw-r--r-- 1 kafka hadoop  6588 Aug 11 14:55 controller.log
-rw-r--r-- 1 kafka hadoop  5700 Aug 11 14:56 server.log
-rw-r--r-- 1 root  root     284 Aug 11 15:09 kafka.err
-rw-r--r-- 1 root  root     522 Aug 11 15:09 kafka.out
-rw-r--r-- 1 kafka hadoop   707 Aug 11 15:09 kafkaServer-gc.log

让我们看一下错误和输出文件：

[root@master ~]# cat /var/log/kafka/kafka.err
OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000c5330000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12)
OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000c5330000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12)
[root@master ~]# cat /var/log/kafka/kafka.out
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 986513408 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /root/hs_err_pid15875.log
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 986513408 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /root/hs_err_pid16305.log

啊，这很奇怪，因为我要求我的虚拟机至少有4 4GB的内存，让我们来看看：

[root@master ~]# cat /proc/meminfo
MemTotal:        1922260 kB
MemFree:          278404 kB
Buffers:            8600 kB
Cached:            43384 kB

最好分配更多的内存！通常，按照IBM support页面的建议，安装BigInsights的最低配置是8 8GB，因此这让您可以深入了解其中的原因。其中至少有2 2GB用于在系统上运行已安装的服务，甚至在开始加载数据库和运行查询之前也是如此。