「xml.sax._exceptions.SAXReaderNotAvailable：找不到解析器」當在jenkins中運行時

Question

因此，我正在努力通過Jenkins和Ansible實現自動登臺部署。其中一部分是使用名爲ec2.py的腳本，以便動態檢索要部署到的匹配服務器列表。

通過SSH連接到Jenkins服務器並從jenkins用戶運行腳本，該腳本按預期運行。然而，詹金斯內運行該腳本會導致以下錯誤：

ERROR: Inventory script (ec2/ec2.py) had an execution error: Traceback (most recent call last): 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/ec2/ec2.py", line 1262, in <module> 
Ec2Inventory() 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/ec2/ec2.py", line 159, in __init__ 
self.do_api_calls_update_cache() 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/ec2/ec2.py", line 386, in do_api_calls_update_cache 
self.get_instances_by_region(region) 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/ec2/ec2.py", line 417, in get_instances_by_region 
reservations.extend(conn.get_all_instances(filters = { filter_key : filter_values })) 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/.local/lib/python2.7/site-packages/boto/ec2/connection.py", line 585, in get_all_instances 
max_results=max_results) 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/.local/lib/python2.7/site-packages/boto/ec2/connection.py", line 681, in get_all_reservations 
[('item', Reservation)], verb='POST') 
File "/opt/bitnami/apps/jenkins/jenkins_home/jobs/Deploy API/workspace/deploy/.local/lib/python2.7/site-packages/boto/connection.py", line 1181, in get_list 
xml.sax.parseString(body, h) 
File "/usr/lib/python2.7/xml/sax/__init__.py", line 43, in parseString 
parser = make_parser() 
File "/usr/lib/python2.7/xml/sax/__init__.py", line 93, in make_parser 
raise SAXReaderNotAvailable("No parsers found", None) 
xml.sax._exceptions.SAXReaderNotAvailable: No parsers found 

我不知道太多關於蟒蛇，所以我不知道如何進一步調試這個問題。

Answer 1

所以事實證明，問題是與詹金斯改寫默認LD_LIBRARY_PATH變量。通過unset運行python之前的變量，我能夠使python應用程序工作！