Since TCP is a reliable protocol it detects the missing TCP ACKs and tries to resend the packets for a relatively long time, typically several minutes. According to our support engineer the best thing would be to see your log files as that will show us why you aren't getting an ID or connection on TV12. It may be picked up by another thread. By adding a postfix of ms the timeout can be also set in milliseconds. org uses Apache Tomcat 7 as application server. This class is usually registered in a JNDI naming service. It is usually best to check your login info with Quick Connect before making a permanent entry. Enter your email and password below. connection-manager. The state is changed from killed to post-stop. properties at the top-level of your classpath, or they may be defined as System properties. how to set timeout for jira user session? there is no way to configure the session timeout in JIRA via administration or a command line option. I have a Java component that calls the Runtime to run the following Unix command. maxHttpHeaderSize. Because if there is any problem with code, everything is working, but after 15 days again getting connection timeout exception. Ping the SMTP telnet port (all working fine, port is open and connection is established and able to get through and received reply). This may be a result of network or system delays; or this may indicate that a malicious client is trying to cause a Denial of Service attack on the server. Figure 1 shows a 3 second time to first byte time over a DSL connection (a search query result page). Use a value less than or equal to 0 for no timeout. Tomcat can also be run as an add-on to the Apache HTTP Server (or Microsoft IIS) - as the Java servlet/JSP container. 67 is the Production database server and the 161. If your PHP script makes external network connections, the connections may. An ordinary forward proxy is an intermediate server that sits between the client and the origin server. The link in the Mirrors column should display a list of available mirrors with a default selection based on your inferred location. HTTP (HyperText Transfer Protocol) Basics Introduction The WEB. Hi I am working with tomcat 4. Tomcat load balancing with HAProxy in openSUSE. conf file, setting proxy_read_timeout to 120 secs solved our problem. Reporting OpenMRS Errors by Email. 0 is a simple identity layer on top of the OAuth 2. The business connector in my case was able to successfully connect back to AX after the IIS reset and Transaction service was back to normal. Apache Log4j Log4j 2 is an upgrade to Log4j that provides significant improvements over its predecessor, Log4j 1. com closed by remote host. " Even i made some changes to solve that. Action: 1) Check if the server session was terminated. A value of zero (the default) causes the connection to. 63 onwards). Running it in Debug mode, fails to connect (see message below),. Log Analysis / Log Management by Loggly: the world's most popular log analysis & monitoring in the cloud. Along with 16+ years of hands on experience he holds a Masters of Science degree and a number of database certifications. 18 servers (running on Red Hat Linux boxes) So "apache 1" connects only to "tomcat 1", and "apache 2" connects only to "tomcat 2", etc. egd: As reported in issue #12683, Oracle DB in some Linux boxes can delay on getting connection to database. The Tomcat Connector will wait 60 seconds for another HTTP request on any given connection before closing that connection. Driver: set the initial connection timeout when initially opening a new socket. You configure connection pooling by using a number of system properties at program startup time. He has authored 12 SQL Server database books, 24 Pluralsight courses and has written over 4900 articles on the database technology on his blog at a https://blog. Once you download the new app you can login to mobile using the same login ID and password you are using on Home banking. Even though option 2 works I feel awkward to downcast the implementation class and then use a timeout method on that class. This should be fixed in Tomcat 7. System Dashboard. Set the total request timeout duration. connect(socketAddress, timeout) c onnects socket to the server with a specified timeout value. Keep in mind, if the server timeout is very low, the server might fail to start. To change the Connection Timeout and Reverse DNS lookup behavior. This is the server. 17 is distributed under the Apache License, version 2. Worker Process's default time out is 20 mins, so if there is no activity in your site for 20 mins the worker process will end and causing your session to end if you are using session in InProc mode. By adding a postfix of ms the timeout can be also set in milliseconds. On 01/09/2015 08:53, [hidden email] wrote: > Hi Mark > > Tomcat version? > > v8. It determines how long nginx will wait to get the response to a request. HTTP (HyperText Transfer Protocol) Basics Introduction The WEB. Solr with Apache Tomcat. Note: this method currently has no effect once the pool has been initialized. The problem: About every one to two days, the apache that is accepting the requests from the load-balancer to pass it on to the tomcat suddenly seems not to be able to connect and is hence spawning workers until it reaches it's limit. connect-timeout. what you are describing is common and occurs when the AJP channel is overloaded. You should now be able to connect with the Enterprise Console. Mainly for Web Development project you need Web Server. How to configure timeout duration at client side for axis2 web services? How to run Java services (or background daemon processes) in an application server or web container? Getting started with Java's ProcessBuilder: A simple utility class to interact with Linux from Java program. Then we'll see the server logs in the Console view, while the server is starting. To use connection pooling, no configuration is required. Spring boot applications start in embedded tomcat container which comes with some pre-configured default behavior via properties file. RELEASE, the tomcat default max-keepalive-timeout is 2000ms. C6300 randomly loses connection with ISP T3/T4 Timeout I purchased this modem back in April 2016 for use at my house with TWC. The Eclipse Tomcat Plugin provides simple integration of a tomcat servlet container for the development of java web applications. disableUploadTimeout: This flag allows the servlet container to use a different, usually longer connection timeout during data upload. You can partially mitigate this by increasing the maximum number of connections being tracked, reducing the tracking timeouts or by disabling connection tracking altogether, which is doable on server, but not on a NAT router, because the latter will cease to function. Along with 16+ years of hands on experience he holds a Masters of Science degree and a number of database certifications. On 01/09/2015 08:53, [hidden email] wrote: > Hi Mark > > Tomcat version? > > v8. The number of seconds Apache httpd will wait for a subsequent request before closing the connection. Unable to find the root cause. properties file, in HOCON configuration files, in a file called mchange-log. We use AI technologies to bring unique insights to the market and to connect IT pros with peers, tools, technical advice, and the vendor experts when they need it most. I have a commercial app running Tomcat 6. You can change the message and send again multiple times. removeAbandonedTimeout (default 300) Timeout in seconds before an abandoned connection can be removed. Note that this timeout specifies the combined maximum duration of the connection time and the time to read the full response. In the JDBC Connection Pool —> Configuration —> Connections tab, you specify the number of connections in the connection pool and details for each connection in the connection pool. Restart tomcat! Database connection failure - connection used up when traffic is spike. According to our support engineer the best thing would be to see your log files as that will show us why you aren't getting an ID or connection on TV12. The number in session-timeout tag is in minutes. System Properties Introduction. 20 seconds). Sets the validation query timeout, the amount of time, in seconds, that connection validation will wait for a response from the database when executing a validation query. Loading Jeffco Connect ☰. Begin with the LXC containers installation exactly as described in the LXC howto and the containers will be placed on your mSATA drive. For example, if the database server is running on a different computer, the connection may be broken. However, leaving the screen display on is also one of the biggest battery killers. If you’re not using Gunicorn, check out our other article on troubleshooting NGINX 502s with PHP-FPM as a backend. determines the output destination:. IdleTime is set to the current time plus Server. e can we copy these files from another tomcat 7 bin foler, is any version match required. To do this, you will need to set the "validationQuery" option on the database connection pool. While the jboss-service. JDBC interceptors: To see an example of how to use an interceptor, take a look at org. I'm looking for a global time out that will kill a Tomcat request thread if it has not responded by a certain timeout. I have a Ubuntu 12. The heartbeat timeout value defines after what period of time the peer TCP connection should be considered unreachable (down) by RabbitMQ and client libraries. your email). The issue here is that the connections between IIS and tomcat are not properly being released. I suggest you to check your conf/logging. I hope this help you. Note: this method currently has no effect once the pool has been initialized. 99% of the time I log in; after 5-10 log-in attempts. Should a timeout occur or a data rate be to low, the corresponding connection will be closed by the server. (the default time-out in SquirrelMail 1. This article presents our experience and practices we got while working with MySQL engine running on Amazon Relational Database Service (RDS). Discover superb restaurants, amazing bars, great things to do and cool events in NYC. As TimeOut is currently used for several different operations, setting it to a low value introduces problems with long running CGI scripts. When you start the Administration Services and MobileFirst runtimes, one or more exceptions are reported in the Apache Tomcat server logs, because of a configuration issue. timeout in application. Consequently, we can resolve this by increasing the server start timeout on the configuration screen we saw above. If you set the properties using the Apache Tomcat administration tab, start the TM1 Application Server using the Component Services option--do not use Cognos Configuration in that case as that Cognos Configuration then resets the properties back to the shipped defaults. They tell you, that httpd was not able to connect to the backend (create a new connection) before a timeout fired. - whether or not to continue to attempt to acquire a connection from the pool even if the nth attempt has failed. Apache Tomcat configuration MySQL The MySQL database closes its connections after a period of non-activity on a connection. Connections are monitored by: Ensuring data is read from the connection during the specified time period (Max Inactivity Duration). It just does not feel right. Hi Rob here again. 30, or all threads in your Tomcat at 10. The default value is 60000 (i. Working with reports in Reporting Services, you can face timeout errors. Service Manager is running. For each TCP request that a client makes through a Network Load Balancer, the state of that connection is tracked. The timeout period elapsed prior to obtaining a connection from the pool. Begin with the LXC containers installation exactly as described in the LXC howto and the containers will be placed on your mSATA drive. or 2) Server timed out the connection. Logging of abandoned Statements and Connections adds overhead for every Connection open or new Statement because a stack trace has to be generated. The heartbeat timeout value defines after what period of time the peer TCP connection should be considered unreachable (down) by RabbitMQ and client libraries. If we discover it is a Tomcat bug we can always re-open. This flag allows the servlet container to use a different, longer connection timeout while a servlet is being executed, which in the end allows either the servlet a longer amount of time to complete its execution, or a longer timeout during data upload. If not specified, this attribute is set to "true". Tomcat is also a servlet container that can execute Java Servlet, and converting JavaServer Pages (JSP) and JavaServerFaces (JSF) to Java Servlet. Connection Timeout Expired. xml that ships with Tomcat sets this to 20000 (i. Apache Tomcat configuration MySQL The MySQL database closes its connections after a period of non-activity on a connection. Connection Pooling: more than one connection per process, but fewer than one per thread, with a mechanism for a thread to take and lock a connection from the pool. However, you can also use more secure connection methods such as Secure FTP (SFTP) or FTP over SSL (FTPS). Because if there is any problem with code, everything is working, but after 15 days again getting connection timeout exception. Note that the timeout only applies to normal clients and it does not apply to Pub/Sub clients, since a Pub/Sub connection is a push style connection so a client that is idle is the norm. In the default tomcat installation the log is shown in the catalina log file and in the console output. This appendix provides a list of common Spring Boot properties and references to the underlying classes that consume them. The number of seconds Apache httpd will wait for a subsequent request before closing the connection. Configuration is necessary only if you want to customize how pooling is done, such as to control the size of the pools and which types of connections are pooled. logAbandoned (default false) Flag to log stack traces for application code which abandoned a Statement or Connection. org uses Apache Tomcat 7 as application server. 11 is going to be harder as I'm at the mercy of using 'approved' software releases. If the process is still running after the timeout, a SIGKILL signal is sent to the process which cannot be ignored and will forcibly stop the processes in the process group. The session timeout in IIS is how long the session can live. Because this timeout is 10 seconds less than the keepAlivetimeout setting on the Tomcat server, the Apache reverse proxy will close the connection first. Defaults to tmlog. org uses Apache Tomcat 7 as application server. Tomcat employs a hierarchical and modular architecture as illustrated: Main Configuration File "server. I have setup the latest node + nginx packages linked above. We have reached the decision that SLF4J is the best option for a logging API: SLF4J has reached a certain level of ubiquity and while SLF4J may not be perfect, it's the de facto standard and it's pointless to try and remake another one. This is the server. It doesn't apply when the editor is open. Logging of abandoned Statements and Connections adds overhead for every Connection open or new Statement because a stack trace has to be generated. The tabs and menu items in the navigation pane on the left may vary depending on the features you have instal. The MojoHaus project is a collection of plugins for Apache Maven 2 & 3. I want to configure my eth0 interface using an external DHCP server (resident in my subnet), so I edited /etc/network/configure with the lines auto eth0 iface eth0 inet dhcp but I also want to. Adding the Maven dependencies. 30 / Apache 2. In the early days, web servers deliver static contents that are indifferent to users' requests. This project is the successor of the original Sysdeo Tomcat Plugin. Our mission is to put the power of computing and digital making into the hands of people all over the world. Here is a Simple demonstration of Debugging Jdbc N/W Connectivity issues. While SocketAppender acts as the active peer in establishing the connection to a logging in Tomcat see JNDI timeout is too long and appenders are. ) We have two timeout parameters: CONNECTION_TIMEOUT - sets max connection time to web service (milliseconds). The Eclipse Tomcat Plugin provides simple integration of a tomcat servlet container for the development of java web applications. According to our support engineer the best thing would be to see your log files as that will show us why you aren't getting an ID or connection on TV12. The server. Thanks Jean-Marc, After checking over my workers. mod_jk "increase the backend idle connection timeout or the connection_pool_minsize" increase the backend idle connection timeout or the connection_pool_minsize; Setting session timeout when using SingleSignOn; How to increase HTTP timeout? RE: mod_jk ajp12/apache/tomcat 3. milter_connect_timeout (30s) The time limit for connecting to a Milter (mail filter) application, and for negotiating protocol options. I receive constant connection interruptions among random disconnects, post loading screen splash, the game itself becomes non-responsive and the process has to be terminated/reloaded. The follow sections list the system properties that may be set to modify the default JBossWeb behaviour. You can change to this directory using the cd command. Connection Timeout (ms) Switching to a async log appender. The default is 0 (infinite timeout, like Socket. When the server receives a message, Server. Re: The VMware view client connection server reached timeout mittim12 Jul 10, 2014 7:35 AM ( in response to Srini19 ) Here is a KB that contains all the ports needed for a View environment. This timeout is defined by the system variable called wait_timeout. Timeout settings for Azure Application Gateway and App Services specifies a default connection time out of 2 idle timeout for Java apps running in Tomcat or. Wanneer besloten wordt om de datafile niet te hernoemen, dan zal de standby-database gebruik willen maken van de hernoemde datafile (zoals in control-file vermeld staat), maar niet kunnen vinden. SO_TIMEOUT - sets read\write time on web service. This feature can be disabled, however, by passing the following property to the server start command:. This only takes effect if disableUploadTimeout is set to false. Hello, I have tomcat 7 and apache 2. (The logging properties defined below may not be defined in c3p0-config. See previous blog on “CIFS and SMB Timeouts in Windows” for more details. Driver: set the initial connection timeout when initially opening a new socket. In the early days, web servers deliver static contents that are indifferent to users' requests. log-abandoned 使用DBCP connection pool，是否追踪废弃statement或连接，默认为: false. Tomcat Clustering - A Step By Step Guide Apache Tomcat is a great performer on its own, but if you're expecting more traffic as your site expands, or are thinking about the best way to provide high availability, you'll be happy to know that Tomcat also shines in a clustered environment. How do people produce the log of how many connection is opened, active, and idle? I tried to get that happened and hoping I can produce the log in tomcat log. The connection is made, the transfer begins, and some time before the transfer is complete, the connection drops. You can connect to a remote (or a publishing server) using different connection methods depending on your set up. CommandTimeout = 300000 (previously they are 10000) // 300000 = 5min. Apache Tomcat is the most widely adopted application and web server in production today. In no case can this option extend the timeout longer than the kernel provides, but it can shorten it. Fix this plz Thnxs My patch - 268. The 'nt secondary err code' identifies the underlying network transport, such as (TCP/IP) timeout limits after a client has abnormally terminated the database connection. There is a case stuck recently in my Grails development project where I need to increase the connection timeout between the browser and the server, because of the reason before the response get completed server leave the connection which resulted in no response. This means that the consoles are deployed when the user requests access. Internet (or The Web) is a massive distributed client/server information system as depicted in the following diagram. htaccess rewrite rules; Using. This only takes effect if disableUploadTimeout is set to false. os_aio_handler(unsigned long, fil_node_t**, void**,. Note that for a given connection object, if the SessionTable remains empty between two cycles of session expiration timer, Windows-based servers will scavenge and disconnect the connection. Timeout settings for Azure Application Gateway and App Services specifies a default connection time out of 2 idle timeout for Java apps running in Tomcat or. 19 Apache Tomcat 8. Hi We are facing issue with dbcp connection pooling in combination of tomcat sever and MySQL. 1 into WebSocket, the protocol switch mechanism available in HTTP/1. It determines how long nginx will wait to get the response to a request. Tomcat is lightweight and agile, simple to use and has a very large ecosystem of add-ons. Note: this method currently has no effect once the pool has been initialized. Connection pool timeout: – This setting determines the timeout value (in seconds) for idle connections in connection pool. reserves the ri. I'm also getting the 500 timeout after adding this to the appsettings for the webapp in azure. Adding the Maven dependencies. I hope this help you. Hi all, we're running tomcat 7. I added that and it is now working. ) What effect do Java Client timeout values have over the connection timeout? A. Registering and purchasing an Arriva Connect smartcard is quick and easy, you will need the following:. Hi Chris, This may be an issue with socket. ), or due to the MySQL server restarting. In the above bean getConnection() is used for fetching connection from a datasource mapped in tomcat server. 17 is distributed under the Apache License, version 2. 0_29, connected via ajp to httpd 2. The client must be configured to request heartbeats. Of course, it's important to know what is relevant to monitor and what are acceptable values for the metrics that are being watched. Any ideas on how to fix it? In the application, when I get the exception start a new connection pool?. In that case debugging looks like the only option? About C3P0 pool:we are under the impression that org. Home page of The Apache Software Foundation. A server will close a connection after the timeout expires to prevent clients from hogging a network connection and reducing server throughput. Use a value less than or equal to 0 for no timeout. Keep in mind, if the server timeout is very low, the server might fail to start. Tomcat jdbc pool implements the ability retrieve a connection asynchronously, without adding additional threads to the library itself. If your ConneCT account was created before 04/13/2014, you will have to reset your password by clicking Forgot User ID or Password link below. Logging Practices. Socket api and SO_TIMEOUT parameter. Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. htaccess rewrite rules; Using. I understand this works with Livingston. The configuration file is written in YAML. The BI Platform Support Tool is a Java based utility used by support engineers, consultants, and BI administrators. The heartbeat timeout value defines after what period of time the peer TCP connection should be considered unreachable (down) by RabbitMQ and client libraries. The TCP transport allows clients to connect to a remote ActiveMQ broker using a TCP socket. This is usually a symptom of your app being overwhelmed and failing to accept new connections in a timely manner. removeAbandonedTimeout (default 300) Timeout in seconds before an abandoned connection can be removed. xml file that can be configured globally for the entire web server - this is located in:. Tomcat jdbc pool implements the ability retrieve a connection asynchronously, without adding additional threads to the library itself; Tomcat jdbc pool is a Tomcat module, it depends on Tomcat JULI, a simplified logging framework used in Tomcat. A simple guide to Tomcat logging. Enter your email and password below. A guide on how to connect and manage PostgreSQL database server from the Java application server. I have one user who is having her Citrix session time out on her in roughly 2 or 3 minutes 1. Frequently used in production enterprise deployments and for smaller application needs, Tomcat is both flexible and powerful. Off-CPU Time Flame Graph mysq. properties at the top-level of your classpath, or they may be defined as System properties. A guide on how to connect and manage PostgreSQL database server from the Java application server. Some very basic and common tools and simple Jdbc programs helps us a lot in debugging the JDBC issues. What the Tomcat Export posts miss is the use of the pool in a standalone environment. A Simple Step-By-Step Guide To Apache Tomcat SSL Configuration Secure Socket Layer (SSL) is a protocol that provides security for communications between client and server by implementing encrypted data and certificate-based authentication. All Tomcat servers provide a default web. It greatly simplifies and streamlines network programming such as TCP and UDP socket server. Apache Tomcat is the best production ready web container. 3) that is logging the time spent to serve the request but in microseconds (10-6) instead of seconds. JSSEImplementation will be used which wraps JVM's default JSSE provider. ) We have two timeout parameters: CONNECTION_TIMEOUT - sets max connection time to web service (milliseconds). This How-To describes how to set-up Tomcat to deliver static HTML pages as well as prepared WAR packages. The timeout period elapsed prior to obtaining a connection from the pool. Ok, thanks for the suggestion. Connect to the Database Engine. Press the Connect button. log_base_dir : Specifies the directory in which the log files should be stored. - the length of time to wait for a connection to become available when all the connections are checked out. If the problem persists, follow the instructions below to see if it solves the Establishing Secure Connection, time-out, or other connection problem in Chrome. Seems to be just a couple of minutes. This may be a result of network or system delays; or this may indicate that a malicious client is trying to cause a Denial of Service attack on the server. Restart tomcat! Database connection failure - connection used up when traffic is spike. 0 installed and the files digest. The fix there was to play with the tcp_keepalive settings To understand recursion, one must first understand recursion. As mentioned in the post Install Eclipse Kepler 64 bit on Windows 7 64 bit, Podcastpedia. 18 to load test an application using JMeter. The connection is made, the transfer begins, and some time before the transfer is complete, the connection drops. Figure 1, timeout expired Azure Web App and SQL Azure. This is made up by appending /bin/java to the JRE_HOME environment variable. Use a larger timeout while waiting for the IMAP read request to complete. The system-propertiescan be set in the AS7 configuration (you need to restart it to get them applied to the web sub system, for example:. Apache 2 with Tomcat 6 How To Configure Tomcat to work with Apache How to Connect Tomcat 6 to Apache HTTP Server 2. Connections are monitored by: Ensuring data is read from the connection during the specified time period (Max Inactivity Duration). It is possible to change this value with " stats timeout ". A connection pool contains a group of JDBC connections that are created when the connection pool is registered, usually when starting up WebLogic Server. Connections are monitored by: Ensuring data is read from the connection during the specified time period (Max Inactivity Duration). Enter your email and password below. 7 as such the new waffle 1. Thanks Jean-Marc, After checking over my workers. This document is geared for Windows Server 2008 R2, however the majority will still be applicable to other Windows operating systems. url命令是一个功能强大的网络工具，它能够通过http、ftp等方式下载文件，也能够上传文件。其实curl远不止前面所说的那些功能，大家可以通过man curl阅读手册页获取更多的信息。. This affects to build process, making it much slower. Connection timeouts are all local connections and receive the following error:. The goal of this web app is to show how analyze the tomcat connection pool in case of abandoned connections. 30, or all threads in your Tomcat at 10. We offer two Linux distros: – CentOS Linux is a consistent, manageable platform that suits a wide variety of deployments. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement. , might occur when using IBM Rational Portfolio Manager. Clients who try to connect when the concurrency slots are all occupied are locked out and have to wait in a. In a production Tomcat environment, effective use of logging is an important part of administrating your site and keeping track of your Tomcat server's performance. This simple interceptor is a cache of three attributes, transaction isolation level, auto commit and read only state, in order for the system to avoid not needed roundtrips to the database. Note that this document comes without warranty of any kind. Get Path of WORK Library for SAS/CONNECT Sessions. However, if you wish to specify non-default options for this webapp, you may do so by adding an element like. Updating to 2. Note: This value should be greater than the SSH timeout value (the timeout value under the defaults section in the configuration file) and less than the value of the persistent connection idle timeout (connect_timeout). org uses Apache Tomcat 7 as application server. I had to research that a few hours ago for the same reasons. Connection Reset 'true' Determines whether the database connection is reset when being removed from the pool. This is the main configuration file that contains configuration properties for transports (HTTP, MQTT, CoAP), database (Cassandra), clustering (Zookeeper and gRPC), etc. log_base_dir : Specifies the directory in which the log files should be stored. Read about 'location of access log and error log on Tomcat 7' on element14. The output will appear in the Log section. Restart Tomcat and be sure to reflect the new port in your URL. Connection timeouts have to do with how long the server will leave a connection between the browser and server open after a response is complete. In case of any question or problem feel free to contact jboss. In the JDBC Connection Pool —> Configuration —> Connections tab, you specify the number of connections in the connection pool and details for each connection in the connection pool. This website is provided by RBC Capital Markets, LLC, Member NYSE / FINRA / SIPC. It doesn't apply when the editor is open. The "Connection Timeout" setting closes the connection and eliminates it from the pool whether or not it has been active orinactive. I have a commercial app running Tomcat 6. If no data has been sent or received by the time that the idle timeout period elapses, the load balancer closes the connection. Tomcat performance monitoring can be done either by relying on JMX beans or by using a dedicated monitoring tool like MoSKito or JavaMelody. If the tcpip connect() can not complete because the remote host is not available, then it will eventually timeout and return a tcpip reason code x'91' (145, ETIMEDOUT). 30 were busy, so Tomcat. x is 15 seconds). [Resolved] Can't Upload Icons/Avatar/files (could not open file transfer connection) If this is your first visit, be sure to check out the FAQ by clicking the link above. This post is part of a series on troubleshooting NGINX 502 Bad Gateway errors. Tomcat runs java by creating a _RUNJAVA variable in setclasspath. They tell you, that httpd was not able to connect to the backend (create a new connection) before a timeout fired.