– 环境：linux RHL 7.5– Tableau Server：2019.1
今天客户咨询一个问题，在访问8850后台时，提示出现以下错误：
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.There was an unexpected error (type=Internal Server Error, status=500).
com.tableausoftware.tabadmin.webapp.exceptions.RestException: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
1、故障排查和描述
第一时间，我让客户使用tsm命令查看了server的状态，显示异常如下：
我们看到上面的关键提示是Native memory allocation (mmap) failed to map，通过这里我们可以看到有用的线索，同时根据log日志进一步查找原因。
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 702021632 bytes for committing reserved memory.
# Possible reasons:
# The system is out of physical RAM or swap space
# In 32 bit mode, the process size limit was hit
# Possible solutions:
# Reduce memory load on the system
# Increase physical memory or swap space
# Check if swap backing store is full
# Use 64 bit Java on a 64 bit OS
# Decrease Java heap size (-Xmx/-Xms)
# Decrease number of Java threads
# Decrease Java thread stack sizes (-Xss)
# Set larger code cache with -XX:ReservedCodeCacheSize=
# This output file may be truncated or incomplete.
#
# Out of Memory Error (os_linux.cpp:2640), pid=6197, tid=0x00007fca569c1700
#
# JRE version: (8.0_181-b13) (build )
# Java VM: OpenJDK 64-Bit Server VM (25.181-b13 mixed mode linux-amd64 compressed oops)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try “ulimit -c unlimited” before starting Java again
#
2、故障解决
此类问题的首选推荐是重启server，方法是使用tsm restart命令。不过重启后，所有进程依然无法使用，tsm状态显示error，后台服务均未启动。
此时需要进一步查看日志文件，Tableau server的日志保存在以下路径中：
/var/opt/tableau/tableau_server/data/tabsvc/logs/
首先查看负责tsm命令的tabadmincontroller_node1-0日志文件，发现一切正常，没有error类的提示；由于上面提到了zookeeper，之后查看负责协调服务的日志，appzookeeper_node1-0.log 日志，反复记录的error问题为：
2019-07-14 21:01:37.130 +0800 29300 main : ERROR org.apache.zookeeper.server.quorum.QuorumPeerConfig – Invalid configuration, only one server specified (ignoring)
既然是协调服务的故障，可能与系统的底层故障有关，因此建议顾客重启操作系统服务器，
重启了操作系统之后，tsm方才正常。
正在通过工程师排查进一步的原因，工程师反馈后会补充。
Jul 14, 2019
吴玉朋
Tableau partner
18615511300
在 2019年7月14日，下午11:16，Tableau Technical Support Case Replies <supportcasereplies@tableau.com> 写道：员
喜乐君 
重启appzookeeper这个进程就可以
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谢谢🙏
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