Traefik Debug Bad Gateway

I have the ssl activated and the page secure but nothing else. yaml for all available configuration options. Normally used when it is required to do HTTPS Connection through a proxy server. 5 and I was wondering if anyone can help me with two things 1) How can I stream video from it using VLC?. The problem randomly re-appears around once per 100,000 served requests so it's really hard to reproduce. 502 Bad gateway 503 Service unavailable 504 Gateway timeout 505 HTTP version not supported. Technical FAQ. Websense Web Security Gateway: What to do when a Web site does not load as expected Websense Support Webinar November 2011. (502 is bad gateway, but I don't know how to debug this issue) Can you help me ? Thank you Last. This is a problem at their end, nothing to do with your system. js proxies; About Edge support for Node. Reverse proxy built into Azure Service Fabric helps microservices running in a Service Fabric cluster discover and communicate with other services that have http endpoints. Set the debugging level (the amount of debugging output printed). Register a service and integrate with traefik. Clients are expected to resend the data after waiting one minute. > > Up until recently, I had been "fixing" this by physically powering off the > firewall by pushing the power button which. August 16, 2018 Java Leave a comment. Second one will explain you how and why it works. How to Fix 504 Gateway Timeout Error? Bad Gateway, check out separate Edit your "wp-config. What sets Traefik apart, besides its many features, is that it automatically discovers the right configuration for your services. Does anyone know a way of solving this?. Q Where to start debugging when my site starts displaying Nginx 502 Bad Gateway or 504 Gateway Timeout Error on some URL s — is this a problem with the web server. Basically, something went wrong somewhere. kube-proxy routing can take up to 30 seconds, ETCD ttl, for finding pods from dead nodes. Using OECGI to generate web pages can sometimes result in the web server returning gateway errors like in the images below: This article is to share the experience and solutions I've come across when dealing with OECGI gateway errors. If it is not possible to enable debug logging mode from the TeamCity web UI, refer to Changing Logging Configuration section to learn how to adjust logging options manually. Lewat artikel dan tutorial yang diterbitkan di blog Hostinger, Ariata ingin membagikan pengetahuan tentang website, WordPress, dan hal terkait hosting lainnya kepada para pembaca. 什么是502 bad gateway 报错 简单来说 502 是报错类型代码 bad gateway 错误的网关。 2. In its essence it is dynamic reverse proxy. Proxying Bittorrent. Traefik offers many other options, consult the documentation for further information. There is nothing useful in logs, ports 80 and 443 are open, LE seems to work correctly (at least for portainer, no problems logged). The exact headers I am writing in PHP when I get the problem is:. So the other day I moved a web role containing WCF services over to an Azure website. What Does 502 Bad Gateway Mean? A 502 Bad Gateway indicates that the edge server (server acting as a proxy) was not able to get a valid or any response from the origin server (also called upstream server). But if you want to do it from your backend system using the Service Maintenance node, then you need to maintain your Hub systems in configure backend through SPRO SAP NetWeaver Gateway Service Enablement Backend OData Channel Connection Settings to SAP NetWeaver Gateway SAP NetWeaver Gateway Settings in the Gateway hub system. Troubleshoot HTTP errors of "502 bad gateway" and "503 service unavailable" in Azure App Service. Thanks for the links, I'll give them a read and see if I come up with a solution. Access tutorials, website testing tools, developer resources and more. I used docker container run command to execute my docker container execute by Drone CI. Currently tested with Transmission 2. Does anyone know a way of solving this?. In Skipper we passively observe errors from endpoints and. Containous brings the future of cloud-native networking by offering the most powerful tools to ease the deployment of your modern IT environments. En millään iiveellä tahdo saada otsikon komboa toimimaan, vaan tuloksena on "Bad Gateway" docker-compose. There are a number of different services and protocols in use on the Internet. SmartPCFixer™ is a fully featured and easy-to-use system optimization suite. If your debugger is reporting a 502 Bad Gateway error, this may mean that Twilio’s internal server had trouble retrieving content from your website. Then rewrite the context to either use that extension directly in place of _. The total size of the JSON is around 12MB. votes Traefik routing - specifying a port (Bad Gateway) docker routing traefik Updated September 27, 2019 12:26 PM. The tactics discussed below provide general fixes for 502 Bad Gateway Errors. Tyk - Open Source API Gateway, API Management Platform, Developer Portal and Analytics - Tyk Tyk is an Open Source API Gateway and provides a completely free API Management Platform. Im trying to setup Zimbra behind Traefik (reverse proxy) and I want Traefik to handle SSL termination. The FT2232HL is dual high-speed USB to UART/FIFO device, and similar FTDI devices are used on many boards as UART to USB converters. Die App läuft ohne Probleme über https oder http. # traefik. Then I added NextCloud with MariaDB and got "Bad Gateway". The flows have been working fine and. Learn more. Unit maintains a single general-purpose log for diagnostics and troubleshooting (not to be confused with the access log). It keeps appending blank lines in between the various element node lines. I have a frontend server running nginx as a proxy to my backend s. In Skipper we passively observe errors from endpoints and. This article describes how to troubleshoot authentication issues through NetScaler or NetScaler Gateway with aaad. Choose the region that matches your API Gateway region. It's the link that appears in the footer if you enable debugging in your Xen config. Your unfamiliarity with EF and. Nginx and PHP-FPM don't come preconfigured to handle large traffic loads. Then it takes the elemetary streams straight out of the RTSP demuxer out to the "std" stream output module, which just connects the TS muxer with the HTTP network output. Error502 page, how to debug it ? Search in titles only. I'm currently receiving a fairly large HTTP flood right now, and it's causing my nginx reverse proxy to produce a 502 Bad Gateway. See maintenance and release schedule for more details. What Is a 502 Bad Gateway Error? How to Fix the 502 Bad Gateway Error; What is a 502 Bad Gateway Error? Every time you visit a website your browser sends a request to a web server. Reset your gateway Heads up: Be sure to make note of any custom settings, like your static IP address if you have one, or your Wi-Fi ® network name (SSID). You can look at API Gateway-level metrics using CloudWatch Metrics. It tell that: CFoudry::BadResponse: 502: 502 Bad Gateway: Registered ednpoint failed to handle the request. Nach einer unbestimmten Zeit (unter einer Stunde) sagt traefik logs ” 502 Bad Gateway ” und meine nginx und uwsgi Logs sagen nichts. Check your routing, firewalls, and that you have a router listening on that IP address. > > Up until recently, I had been "fixing" this by physically powering off the > firewall by pushing the power button which. Return code is: 502 , ReasonPhrase:Bad Gateway. Gateway - This is a vague tag for all kinds of gateways including networks, general interfaces and products, where this term is used with its own meaning Messages - a communication containing some information, news, advice, request, or the like, sent by messenger, radio, telephone, or other means. After a longer pause with no requests (e. Ok so I developed a web app in python and it worked with the internal server: (debug = True) with no issue at all. sh dans mon projet qui contient les paramètre pour gunicorn. It works with "404 No such domain" just as well as with "502 Bad Gateway". Includes configuration for the newly released Traefik 2. Therefore, I would like raise this issue to ESRI developer Team for their attention. Debugging 502 Bad Gateway Errors 3 Answers Consistent 502 bad gateway errors this week 0 Answers 502 Bad Gateway: Registered endpoint failed to handle the request. ok I followed the instructions to the letter. Is the bad gateway coming from a pythonanywhere-hosted web app? If so, is there anything in the. In the search field, type “WooCommerce Stripe Payment Gateway” and click “Search Plugins”. aws-alb-ingress-controller directly routes traffic to your Kubernetes services, which is both good and bad, because it can reduce latency, but comes with the risk of depending on kube-proxy routing. " Přitom požadovaná operace proběhne - např. We highly suggest you not to use a self signed certificate for any e-commerce site or any other sites which require sensitive data like bank or credit card information. This article shows how to use a $10 FTDI board as a JTAG interface to program and debug the the NXP K22FX512 is using the ESP32 as a Wi-Fi gateway chance of a bad bootup due to a bad flash. I looked at using one of the FTDI FT2232HL development boards which are supported by OpenOCD. The HTTP 502 is usually returned when the backend worker terminates the connection unexpectedly, so there can be quite a few reasons why the issue crops up. cs Exception: "The remote server returned an unexpected response: (502) Bad Gateway. Other page output is now working. In the same time, it keeps flexibility as the customer programming modules-dll's (e. If you're using your own domain, it's easier to do that first before going through the setup wizard. Set the debugging level (the amount of debugging output printed). File permissions. Hi Experts, I get a bad gateway when running the web application from docker. Time to upgrade! Before you post; make sure you are using at least PHP Version 5. 2016 um 19:19 schrieb Bill Arlofski: > Hi everyone > > I noticed after one of the recent upgrades to the 2. Criteria Usage; Questions with keyword1 or keyword2: keyword1 keyword2: Questions with a mandatory word, e. licensed under cc by-sa 3. Is the bad gateway coming from a pythonanywhere-hosted web app? If so, is there anything in the. GlobalProtect Client Status/Detail tab. That's the way it is all the time. Typically an HTTP. 502 and 504 errors are related to a bad gateway, meaning that while the reverse proxy server is operational, something it needs to collect from the origin server is not working, or the connection between the reverse proxy server and the origin server is broken. 14b with ~7,000 torrents does not fail nor give out any 502 bad gateways. I have a frontend server running nginx as a proxy to my backend s. 158 is the server and 10. set_tunnel (host, port=None, headers=None) ¶ Set the host and the port for HTTP Connect Tunnelling. When you run tests against a HTTPS site, the browser shows "Bad Gateway", or a security warning, or just won't load the page you wanted. Let's switch over to the API Gateway side of the house. Using -o debug, I got command-line line 0: Bad SSH2 cipher spec You got "connection reset by peer" with a bad gateway?!?. All that was printed on the page a "Bad Gateway". Im trying to setup Zimbra behind Traefik (reverse proxy) and I want Traefik to handle SSL termination. A stable hosting environment and protection from malware, spam, etc. What’s an integration? See Introduction to Integrations. What are the reasons for a Bad Gateway error? A little more clarity on what the possible causes are would be helpful. For the last 3 days I see “Bad Gateway” “502 Error” or “Server Error” on probably 2 of 3 refreshes on the page. Jupyter replaces it and will be fully incorporated into the upcoming 16. I went and tried executing it manually from /usr/sbin/php-fpm <- this is where I saw there was an issue with APC, and after looking a bit online, I saw that by simply removing the "M" in /etc/php5/conf. I love Nginx for its revery proxy capabilities and ease of configuration. The form is "API-Gateway-Execution-Logs_/ Select your logs and you will see a giant list of log streams with cryptic identifiers. Please have your webmaster do something about the # of allowed connections, timeout settings, etc on your website. Which tells us that you can’t talk to anything on that IP address. I created a dummy example just to show how to run a flask application over HTTPS with traefik and Let's Encrypt. 标题:Traefik Error forwarding EOF / Bad Gateway (Let's Encrypt Related). You can then reapply them after the factory reset. Hi, I have set up Mercurial 1. The Unraid box currently only has the one IP associated with it so therefore just adding that ip in your docker config won't work. Strato on azure worked yesterday when installed. Traefik reverse proxy makes setng up reverse proxy for docker containers host system apps a breeze. In just a few minutes you'll have a WordPress website running with all of these open-source goodies: Docker, a powerful and standardized way to deploy applications Free SSL certificates from Let's Encrypt (via Traefik) phpMyAdmin to easily manage your databases Automatic container updates (via Watchtower) If you've got your own. it was driving me nuts having to go back and forth between root and …. The Reason. You could add this IP to your unraid box by adding an extra IP to the network interface, the command for this would be: ip addr add 192. Im testing locally with self-signed certificates generated with openssl under a "certs" folder. > > Up until recently, I had been "fixing" this by physically powering off the > firewall by pushing the power button which. 9-2 but only when sending a Location: tag. It is all started in 2013 when IBM developed Node-RED project. Is the bad gateway coming from a pythonanywhere-hosted web app? If so, is there anything in the. # traefik. 38:8000: connect: network is unreachable". Traefik is an open-source Edge Router that makes publishing your services a fun and easy experience. x) while talking to backend server (Apache 2. To me, it looks like the file you are trying to stream is somehow corrupted. This is a problem at their end, nothing to do with your system. All that was printed on the page a "Bad Gateway". This blog post will go through an overview of the key configuration settings of this design. PHP Manager for IIS is a GUI for managing multiple PHP installations on the IIS server. Check the logfiles there for example. So I was debugging one of my servers today and I was trying to work out for the subdomain I had setup it. Edit the traefik. phpd 'ü±Sd «==ê¶ ,php/export/class-wp-export-wxr-formatter. I recently hit this problem after manually. Unavailable, or 502 Bad Gateway. When we take a look at the documentation, then we see how the logic works. Q Where to start debugging when my site starts displaying Nginx 502 Bad Gateway or 504 Gateway Timeout Error on some URL s — is this a problem with the web server. Review the documentation for your choice of Ingress controller to learn which annotations are supported. But if I click Validate debug configuration on the web server (because I want to confirm settings), the window shows the settings for Local Web Server or Shared Folder. With Ask the Experts™, submit your questions to our certified professionals and receive unlimited, customized solutions that work for you. 可以看到,访问test1的时候,反回了“Bad Gateway”错误。访问test2,则正常。这可能是因为后端的tomcat服务的使用了自签证书的原因,导致了访问失败,也可能是traefik自身的原因,这里不去深究。. hope i have provided u the right thing. I'm pretty much in love with Nginx' simplicity and capabilities as a swiss army knife for all kinds of HTTP magic. The HTTP 502 is usually returned when the backend worker terminates the connection unexpectedly, so there can be quite a few reasons why the issue crops up. Learn more. Then I added NextCloud with MariaDB and got "Bad Gateway". The web server receives and processes the request, and then sends back the requested resources along with an HTTP header and HTTP status code. # traefik. What Does 502 Bad Gateway Mean? A 502 Bad Gateway indicates that the edge server (server acting as a proxy) was not able to get a valid or any response from the origin server (also called upstream server). This only happens for HTTPS sites or single page apps served over HTTPS. votes Traefik routing - specifying a port (Bad Gateway) docker routing traefik Updated September 27, 2019 12:26 PM. 1 I create the. However, when I went to auth. The flows have been working fine and. It was a time that ubuntu asked me to update php. 0 on Google cloud. You'll fit in here. 502 Bad Gateway after calling WS from. But I was sure that it was working before, I didn’t change any settings. 502 Bad Gateway The server returned an invalid or incomplete response. As a result, the server which is acting as a gateway or proxy will report that as a status of 502. 7), there is no problem. When a service is deployed on the secure agent and the service connector is setup to connect to this service, the test fails with 502 Bad Gateway error, something like: Cause INFA_Cause. or use a pattern that will catch that extension. What Does 502 Bad Gateway Mean? A 502 Bad Gateway indicates that the edge server (server acting as a proxy) was not able to get a valid or any response from the origin server (also called upstream server). Unable to find the root cause. x - Also read Support Forum - Read this before posting. Hi, I am lost I am trying to understand reverse proxy for two weeks and use it on my OMV server, but I am literally lost On my server, I have NextCloud and Home Assistant which can be access from the outside, with two different DuckDNS…. I post the code that Bad Panda gave to my screen to help Flickr in debugging. " Přitom požadovaná operace proběhne - např. yaml for all available configuration options. HTTP 502 (bad gateway) errors can occur for one of the following reasons: The web server or associated backend application servers running on EC2 instances return a message that can't be parsed by your Classic Load Balancer. In the same time, it keeps flexibility as the customer programming modules-dll's (e. This usually does not work because SELinux prevents it for a reason. Hi Experts, I get a bad gateway when running the web application from docker. I have an issue when I successfully built docker container which leads to bad gateway on subdomain. But if you want to do it from your backend system using the Service Maintenance node, then you need to maintain your Hub systems in configure backend through SPRO SAP NetWeaver Gateway Service Enablement Backend OData Channel Connection Settings to SAP NetWeaver Gateway SAP NetWeaver Gateway Settings in the Gateway hub system. ok I followed the instructions to the letter. on windows azure web site: after lot of requesting, you will suddenly get 502 bad gateway on iis express that is installed with web matrix 3 (maybe version 8), the request instantly not responsive this only happen if you use internet explorer. can someone help me, because I don't understand because it happen. Make sure the remote agent service is installed and started on the target computer. /ghost-backup. Typically an HTTP. phar php/export/functions. Thanks! Please check your inbox to confirm your subscription. The newest "trick" it's playing on me is this: I'm online, I'm posting, everything seems to be going fine. Check your routing, firewalls, and that you have a router listening on that IP address. This morning, VM restarted and dashboard appears to work. Gateway - This is a vague tag for all kinds of gateways including networks, general interfaces and products, where this term is used with its own meaning Messages - a communication containing some information, news, advice, request, or the like, sent by messenger, radio, telephone, or other means. In the second post of the series I dive into the details of what is involved setting up for an ever-growing number of applications on a handful of physical servers on my Home Lab. Background. Traefik bad getway. Please have your webmaster do something about the # of allowed connections, timeout settings, etc on your website. The debugging log can be written to a memory using a cyclic buffer. Veja como corrigir o erro 502 em um passo a passo simples. I made a clean and tidy new installation with docker dial and traefik-proxy. This is the nginx log (10. ly/2kN4O08 Aproveite e veja também nosso artigo sobre 502: https://bit. I think you can ignore. The advantage is that logging on the debug level will not have significant impact on performance under high load. After the upgrade which completed without errors I get "502 Bad Gateway nginx/1. Since the previous Ghost update process was not as painless as advertised, I delayed getting version 1. Both Traefik and Nexcloud are at the same network ("web") exposed to the Internet, MariaDB is internal only (see docker-compose and traefik. A 504 gateway timeout could also be because of a DNS issue. ##简介 traefik是一款开源的反向代理与负载均衡工具。软件定位是做负载均衡器,提供好用的负载均衡服务,不要老拿它跟nginx. You mentioned 'normally', but what is normal to you using /etc/nginx/sites-available (usually on Debian/Ubuntu) is not normal for RHEL based users like Fedora, CentOS and RHEL itself. Can you try with a different file?. First part will show you how to get it running. I have a Dreambox 800 and I flashed it with Gemini 4. 1 through 2. Basically, something went wrong somewhere. To download the GlobalProtect client and to confirm successful SSL connection between the client and the portal/gateway. toml # ##### ##### # Global. Using Traefik and Kubernetes together is a little fiddly, and getting a working deployment on a cloud provider even more so. From: Technical Queries Date: Tue, 3 Aug 2010 14:12:55 +0530 (IST). If you are using Pachyderm version 1. Check the traefik UI to see the number of whoami backends is updated. In "Eclipse JTAG Debugging the ESP32 with a SEGGER J-Link" I used a SEGGER J-Link to debug an ESP32 device with JTAG. x and jquery exists. Whilst our approaches have evolved over the years, our overall aim by no means has and thats making sure our users web pages rank on the first page of the search engines for suitable keywords at the same time only using ethical and long-lasting strategies. To check the status of the connection: GlobalProtect client logs: To check detailed debug logs from the GlobalProtect client. My role now is a Web Architect with Sogeti USA, as a contractor. Push large size docker image to Artifactory Docker v2 registry behind Apache httpd. Since the previous Ghost update process was not as painless as advertised, I delayed getting version 1. Configuring Local PHP Interpreters. By default, delegation is disabled for tenants without an add-on in use as of 8 June 2017. Community Support - Open Source Project Repository Hosting; OSSRH-52235; Problem uploading artifact - 502 Bad Gateway. CRUD is the jargon used in OData for the below Operations. Forum rules ownCloud 7. Clique aqui https://bit. You mentioned ‘normally’, but what is normal to you using /etc/nginx/sites-available (usually on Debian/Ubuntu) is not normal for RHEL based users like Fedora, CentOS and RHEL itself. I build traefik with cloudflare CDN. The data should be aggregated appropriately, combining multiple timeslice data values for the same metric into a single aggregate timeslice data value. # traefik. yaml for all available configuration options. Michael Champagne is a containers and OSS enthusiast / fan. When I revert to my backup everything works fine. The difficulty lies in debugging your requests to find a root cause. I have the ssl activated and the page secure but nothing else. This page has a detailed explanation of what the debugging directives do. The application gateway relieves your of the management of the platform/service. 38:8000: connect: network is unreachable". Everything works until use the decorator and open up the window under port 8000 I get 502 bad gateway. Thanks for all. exe) messenger functionality is changed to increase performance for non-SSL request. jms for the application shows a delay between the message being sent to the activeMQ server and the timeout as below 05-25 20:19:32. I've created a simple O365 email approval flow when a new item is added to a SharePoint. Traefik Debug Bad Gateway. It's roughly 30% of the requests that are failing. This is the nginx log (10. Hi, I have set up Mercurial 1. Regarding the article you linked, while the configuration of an HTTPS load balancer and nginx. Access tutorials, website testing tools, developer resources and more. Last week I received a typical run of the mill phishing email littered with the usual bad Engrish making the instructions far from believable but being bored I decided to take a look at the link they were pushing. go:39 uploaded 1117752180 bytes. Later we will also enable backups, monitoring, and live debugging on sandboxes, thus improving sandboxes for use for production applications. 0-fpm cron. Containous Releases Traefik 2. js modules; Use apigee-access (Deprecated) Introduction; Receiving 502 Bad Gateway From Proxy. This is a problem at their end, nothing to do with your system. Jan-25 22:50:01 :: INFO :: Writing PID 3406 to /usr/pbi/maraschino-amd64/etc/maraschino/maraschino. [Solved]502 bad gateway nginx. It has varying degrees of detail, but it's almost always useful in discovering why an addon install fails, why media stops playing, and other issues. 32) using the following configuration : _____ +-----+. Clients are expected to resend the data after waiting one minute. I created a dummy example just to show how to run a flask application over HTTPS with traefik and Let's Encrypt. The 502 is reported by reverse proxy (Apache 2. traefik : Stackoverflow Help. What Is a 502 Bad Gateway Error? How to Fix the 502 Bad Gateway Error; What is a 502 Bad Gateway Error? Every time you visit a website your browser sends a request to a web server. Payment Gateway encrypts all payment data stored in data or debug files. You can use this call to verify your connection to our platform. votes Traefik routing - specifying a port (Bad Gateway) docker routing traefik Updated September 27, 2019 12:26 PM. This guide will help you troubleshoot session affinity issues with Azure Application Gateway, it also describes how to enable Application Gateway logging and use Fiddler for debugging. I made a clean and tidy new installation with docker dial and traefik-proxy. First of all - either you use a remote collector (full Spiceworks install wich scans the local net and report the results to your Central Server) OR you use the new Spiceworks Agent which scans the lcal machine and reports the results to your Central Server. This is a super simple service for generating different HTTP codes. NET do not mean that Identity is useless, or bad. 28 redirector but no matter what I try I only get "incorrect function" returned to the browser. The debugging log can be written to a memory using a cyclic buffer. 产生错误的原因 连接超时 我们向服务器发送请求 由于服务器当前链接太多,导致服务器方面无法给于正常的响应,产生此类报错 3. The form is "API-Gateway-Execution-Logs_/ Select your logs and you will see a giant list of log streams with cryptic identifiers. At night, VM is mark for autoshutdown. Problem with bug report comments. However, if I use JS API 2. /ghost-backup. Both Traefik and Nexcloud are at the same network ("web") exposed to the Internet, MariaDB is internal only (see docker-compose and traefik. Hi all, I've just deployed Mobility in our Lync environment. The apparent workaround for many is to run traefik in a privileged container. 253 dev IF where IF is the network interface you would like to add that IP to. Maybe they can give more debugging hints. SUSE (Software and System Entwicklung (Germany) meaning Software and System Development, in English) Linux lies on top of Linux Kernel brought by Novell. hi anil, thanx 4 d response. After the upgrade which completed without errors I get "502 Bad Gateway nginx/1. In its essence it is dynamic reverse proxy. It receives requests on behalf of your system and finds out which components are responsible for handling them. Ever since PhpStorm 6, we've had a built-in webserver which could serve up static content like HTML, JavaScript and CSS. # (a) Custom Gateway. Troubleshoot HTTP errors of "502 bad gateway" and "503 service unavailable" in Azure App Service. licensed under cc by-sa 3. Push large size docker image to Artifactory Docker v2 registry behind Apache httpd. This was massively complicated by the fact that Traefik 2. Collaborative Editing fails to start with 502 Bad Gateway (or 404) errors for sockjs. * * @access private * @package WordPress * @since 2. As I say, I've followed the instructions in the above doc for "Using PhoneGap Build's Debug Server", but to no avail. Net, PHP, Java etc. Kesalahan ini umumnya disebabkan oleh masalah pada server, namun tidak jarang dikarenakan masalah dari sisi website sendiri. The free edition is an improvement of the sandbox environment. je travail dans un environement virtuel. 0 and later. Hi All, I send this query 2-3 times.