我有一个Flume代理配置,我使用HTTPSource从特定服务接收事件数据。出于测试的目的,我将创建静态JSON结构作为Python中的字符串对象(名为data)(请参阅下面的代码片段1),并将该对象发送给带有适当头部的flume,但之后flume将返回400个错误的请求错误时间(见下面的片段2)。相关的水槽执行异常消息已在下面的代码片段3中提供。Flume HTTPSource拒绝由于malform导致的JSON体
问题:任何人都可以告诉我什么是我的静态JSON请求导致水槽HTTPSource拒绝它吗?是否还有其他问题可能会丢失,这与json数据无关?谢谢。
SNIPPET 1(Python脚本生成包含我的静态JSON数据虚设HTTP请求)
import urllib2, json
serviceName = "serviceA"
timestamp = datetime.datetime.strftime(datetime.datetime.now(), '%Y-%m-%d %H:%M:%S')
body = "{ \"service\":\"" + serviceName + "\" }"
print("BODY: " + body)
//My JSON data
data = "[{ \"headers\" : { \"timestamp\" : \"" + timestamp + "\" }, \"body\" : " + body + " }]"
print("DATA: " + data)
req = urllib2.Request("http://10.1.0.100:5140")
req.add_header('Content-Type', 'application/json')
response = urllib2.urlopen(req, data)
SNIPPET 2 - 的Python脚本
BODY: { "service":"serviceA" }
DATA: [{ "headers" : { "timestamp" : "2016-01-13 12:26:48" }, "body" : { "service":"serviceA" } }]
Traceback (most recent call last):
File "./event_data_gen.py", line 57, in <module>
response = urllib2.urlopen(req, data)
File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.7/urllib2.py", line 410, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 523, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 448, in error
return self._call_chain(*args)
File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 531, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 400: Bad request from client.
Request has invalid JSON Syntax.
SNIPPET 3的执行输出 - Flume执行输出中的异常消息
2016-01-13 12:26:48,653 ([email protected])
[WARN - org.apache.flume.source.http.HTTPSource$FlumeHTTPServlet.doPost(HTTPSource.java: 242)] Received bad request from client.
org.apache.flume.source.http.HTTPBadRequestException: Request has invalid JSON Syntax.
at org.apache.flume.source.http.JSONHandler.getEvents(JSONHandler.java:119)
at org.apache.flume.source.http.HTTPSource$FlumeHTTPServlet.doPost(HTTPSource.java:240)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:814)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT at line 1 column 67
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:176)
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:761)
at org.apache.flume.source.http.JSONHandler.getEvents(JSONHandler.java:117)
... 17 more
Caused by: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT at line 1 column 67
at com.google.gson.stream.JsonReader.nextString(JsonReader.java:464)
at com.google.gson.internal.bind.TypeAdapters$13.read(TypeAdapters.java:349)
at com.google.gson.internal.bind.TypeAdapters$13.read(TypeAdapters.java:337)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
我认为python脚本和数据都没有问题。不知何故,有效的json语句不被flume接受。它在json请求的body声明中使用了双配额,即使整个json strcuture都是有效的。奇怪的是,水槽用户指南根本没有触及这个。例如: [{“headers”:{“timestamp”:“2016-01-13 15:21:31”},“body”:{“from”: “device1”,“user”:“Mehmet”,“vendor”:“TELIA”,“service”:“serviceA”,“function”:“scale-out”,“description”:“REASON TEXT 1”}}] –
你的配置是哪一个?只是为了知道你在Http源中使用了哪个处理程序。 – frb
这是jsonhandler ... –