Big json handling with jmeter - jmeter

Question

Hi guys i have some problems handling a big json input with jmeter (about 55 k rows). Initially i tried to use the function
${__FileToString(myPath/test.json,,)}
but seems like this doesn't work properly: I got another error during the process.
java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "1["
at java.net.URLDecoder.decode(Unknown Source) ~[?:1.8.0_301]
at org.apache.jmeter.protocol.http.visualizers.RequestViewHTTP.decodeQuery(RequestViewHTTP.java:336) ~[ApacheJMeter_http.jar:5.5]
at org.apache.jmeter.protocol.http.visualizers.RequestViewHTTP.getQueryMap(RequestViewHTTP.java:306) ~[ApacheJMeter_http.jar:5.5]
at org.apache.jmeter.protocol.http.visualizers.RequestViewHTTP.setSamplerResult(RequestViewHTTP.java:216) ~[ApacheJMeter_http.jar:5.5]
at org.apache.jmeter.visualizers.RequestPanel.setSamplerResult(RequestPanel.java:116) ~[ApacheJMeter_components.jar:5.5]
at org.apache.jmeter.visualizers.SamplerResultTab.setupTabPane(SamplerResultTab.java:256) ~[ApacheJMeter_components.jar:5.5]
at org.apache.jmeter.visualizers.ViewResultsFullVisualizer.valueChanged(ViewResultsFullVisualizer.java:395) ~[ApacheJMeter_components.jar:5.5]
at org.apache.jmeter.visualizers.ViewResultsFullVisualizer.valueChanged(ViewResultsFullVisualizer.java:373) ~[ApacheJMeter_components.jar:5.5]
at javax.swing.JTree.fireValueChanged(Unknown Source) ~[?:1.8.0_301]
at javax.swing.JTree$TreeSelectionRedirector.valueChanged(Unknown Source) ~[?:1.8.0_301]
at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(Unknown Source) ~[?:1.8.0_301]
at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(Unknown Source) ~[?:1.8.0_301]
at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(Unknown Source) ~[?:1.8.0_301]
at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(Unknown Source) ~[?:1.8.0_301]
at javax.swing.JTree.setSelectionPath(Unknown Source) ~[?:1.8.0_301]
at javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(Unknown Source) ~[?:1.8.0_301]
at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(Unknown Source) ~[?:1.8.0_301]
at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(Unknown Source) ~[?:1.8.0_301]
at java.awt.AWTEventMulticaster.mousePressed(Unknown Source) ~[?:1.8.0_301]
at java.awt.Component.processMouseEvent(Unknown Source) ~[?:1.8.0_301]
at javax.swing.JComponent.processMouseEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.Component.processEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.Container.processEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.Component.dispatchEventImpl(Unknown Source) ~[?:1.8.0_301]
at java.awt.Container.dispatchEventImpl(Unknown Source) ~[?:1.8.0_301]
at java.awt.Component.dispatchEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.Container.dispatchEventImpl(Unknown Source) ~[?:1.8.0_301]
at java.awt.Window.dispatchEventImpl(Unknown Source) ~[?:1.8.0_301]
at java.awt.Component.dispatchEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue.dispatchEventImpl(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue.access$500(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue$3.run(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue$3.run(Unknown Source) ~[?:1.8.0_301]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_301]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) ~[?:1.8.0_301]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue$4.run(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue$4.run(Unknown Source) ~[?:1.8.0_301]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_301]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventQueue.dispatchEvent(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) ~[?:1.8.0_301]
at java.awt.EventDispatchThread.run(Unknown Source) ~[?:1.8.0_301]
I don't know how to solve this problem, I tried this request on postman and I have no problem. Is there someone that can help me?

Answer 1

The "error" you're getting is not connected with sending the request, it's rather rendering it using View Results Tree listener, most probably you chose some rendering format which doesn't match JSON or using GET method instead of POST or whatever.
If your request works fine in Postman you can just record it using JMeter's HTTP(S) Test Script Recorder and parameterize it as required
Also be informed of HTTP Raw Request sampler which has nice feature or streaming the file directly to the backend without loading it into memory first, check out HTTP Raw Request for SOAP + MTOM thread for more details.
HTTP Raw Request sampler can be installed using JMeter Plugins Manager