org.eclipse.swt.SWTException: Invalid thread access

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  • swt threads
    via by tarun swoop,
  • Calling Alert() in a javascript step causes an exception, and the transformation terminates. Minimal sample attached. This sample works in 4.3 as expected. The following samples we ship with PDI break because of this error: samples/transformations/JavaScript - Parse XML.ktr samples/transformations/General - Annotated SOAP Web Service call.ktr samples/transformations/JavaScript - process all fields per row.ktr samples/transformations/String date with time to Date using metadata conversion.ktr Stack Trace: 2012/10/30 12:16:02 - Spoon - Logging goes to file:///var/folders/h2/ksxk_qk12y712379ckh3fpyc0000gn/T/spoon_304c6810-2283-11e2-b724-57077efae662.log 2012/10/30 12:16:05 - class org.pentaho.agilebi.platform.JettyServer - WebServer.Log.CreateListener localhost:10001 2012/10/30 12:16:05 - Version checker - OK 2012/10/30 12:18:28 - Spoon - Transformation opened. 2012/10/30 12:18:28 - Spoon - Launching transformation [test]... 2012/10/30 12:18:28 - Spoon - Started the transformation execution. 2012/10/30 12:18:28 - test - Dispatching started for transformation [test] 2012/10/30 12:18:28 - Transformation metadata - Natural sort of steps executed in 1 ms (2 time previous steps calculated) 2012/10/30 12:18:28 - Generate Rows.0 - Finished processing (I=0, O=0, R=0, W=2, U=0, E=0) 2012/10/30 12:18:28 - Modified Java Script Value.0 - Optimization level set to 9. 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Unexpected error 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : org.pentaho.di.core.exception.KettleValueException: 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Javascript error: 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Wrapped org.eclipse.swt.SWTException: Invalid thread access (script#3) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesMod.addValues(ScriptValuesMod.java:458) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesMod.processRow(ScriptValuesMod.java:689) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.step.RunThread.run(RunThread.java:50) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at java.lang.Thread.run(Thread.java:680) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Caused by: org.mozilla.javascript.WrappedException: Wrapped org.eclipse.swt.SWTException: Invalid thread access (script#3) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java:1786) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:183) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:413) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:97) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1._c_script_0(script:3) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1.call(script) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:426) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3178) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1.call(script) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1.exec(script) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesMod.addValues(ScriptValuesMod.java:377) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : ... 3 more 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Caused by: org.eclipse.swt.SWTException: Invalid thread access 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.SWT.error(SWT.java:4282) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.SWT.error(SWT.java:4197) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.SWT.error(SWT.java:4168) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Widget.error(Widget.java:774) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:569) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Dialog.checkParent(Dialog.java:165) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Dialog.<init>(Dialog.java:127) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.MessageBox.<init>(MessageBox.java:98) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.ui.spoon.Spoon.messageBox(Spoon.java:7892) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesAddedFunctions.Alert(ScriptValuesAddedFunctions.java:1325) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at java.lang.reflect.Method.invoke(Method.java:597) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:161) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : ... 12 more 2012/10/30 12:18:28 - Modified Java Script Value.0 - Finished processing (I=0, O=0, R=1, W=0, U=0, E=1) 2012/10/30 12:18:28 - Spoon - The transformation has finished!! 2012/10/30 12:18:28 - test - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Errors detected! 2012/10/30 12:18:28 - test - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Errors detected! 2012/10/30 12:18:28 - test - test 2012/10/30 12:18:28 - test - test 2012/10/30 12:19:38 - Spoon - Spoon 2012/10/30 12:19:47 - Spoon - Save as... 2012/10/30 12:19:47 - Spoon - Save file as... 2012/10/30 12:19:49 - Spoon - Starting job... 2012/10/30 12:19:51 - Spoon - Job has ended.
    via by Slawomir Chodnicki,
  • Calling Alert() in a javascript step causes an exception, and the transformation terminates. Minimal sample attached. This sample works in 4.3 as expected. The following samples we ship with PDI break because of this error: samples/transformations/JavaScript - Parse XML.ktr samples/transformations/General - Annotated SOAP Web Service call.ktr samples/transformations/JavaScript - process all fields per row.ktr samples/transformations/String date with time to Date using metadata conversion.ktr Stack Trace: 2012/10/30 12:16:02 - Spoon - Logging goes to file:///var/folders/h2/ksxk_qk12y712379ckh3fpyc0000gn/T/spoon_304c6810-2283-11e2-b724-57077efae662.log 2012/10/30 12:16:05 - class org.pentaho.agilebi.platform.JettyServer - WebServer.Log.CreateListener localhost:10001 2012/10/30 12:16:05 - Version checker - OK 2012/10/30 12:18:28 - Spoon - Transformation opened. 2012/10/30 12:18:28 - Spoon - Launching transformation [test]... 2012/10/30 12:18:28 - Spoon - Started the transformation execution. 2012/10/30 12:18:28 - test - Dispatching started for transformation [test] 2012/10/30 12:18:28 - Transformation metadata - Natural sort of steps executed in 1 ms (2 time previous steps calculated) 2012/10/30 12:18:28 - Generate Rows.0 - Finished processing (I=0, O=0, R=0, W=2, U=0, E=0) 2012/10/30 12:18:28 - Modified Java Script Value.0 - Optimization level set to 9. 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Unexpected error 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : org.pentaho.di.core.exception.KettleValueException: 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Javascript error: 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Wrapped org.eclipse.swt.SWTException: Invalid thread access (script#3) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesMod.addValues(ScriptValuesMod.java:458) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesMod.processRow(ScriptValuesMod.java:689) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.step.RunThread.run(RunThread.java:50) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at java.lang.Thread.run(Thread.java:680) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Caused by: org.mozilla.javascript.WrappedException: Wrapped org.eclipse.swt.SWTException: Invalid thread access (script#3) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java:1786) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:183) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:413) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:97) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1._c_script_0(script:3) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1.call(script) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:426) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3178) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1.call(script) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.gen.script_1.exec(script) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesMod.addValues(ScriptValuesMod.java:377) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : ... 3 more 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Caused by: org.eclipse.swt.SWTException: Invalid thread access 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.SWT.error(SWT.java:4282) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.SWT.error(SWT.java:4197) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.SWT.error(SWT.java:4168) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Widget.error(Widget.java:774) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:569) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Dialog.checkParent(Dialog.java:165) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.Dialog.<init>(Dialog.java:127) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.eclipse.swt.widgets.MessageBox.<init>(MessageBox.java:98) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.ui.spoon.Spoon.messageBox(Spoon.java:7892) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.pentaho.di.trans.steps.scriptvalues_mod.ScriptValuesAddedFunctions.Alert(ScriptValuesAddedFunctions.java:1325) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at java.lang.reflect.Method.invoke(Method.java:597) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:161) 2012/10/30 12:18:28 - Modified Java Script Value.0 - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : ... 12 more 2012/10/30 12:18:28 - Modified Java Script Value.0 - Finished processing (I=0, O=0, R=1, W=0, U=0, E=1) 2012/10/30 12:18:28 - Spoon - The transformation has finished!! 2012/10/30 12:18:28 - test - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Errors detected! 2012/10/30 12:18:28 - test - ERROR (version 4.4.0-GA, build 17527 from 2012-10-29 20.25.00 by buildguy) : Errors detected! 2012/10/30 12:18:28 - test - test 2012/10/30 12:18:28 - test - test 2012/10/30 12:19:38 - Spoon - Spoon 2012/10/30 12:19:47 - Spoon - Save as... 2012/10/30 12:19:47 - Spoon - Save file as... 2012/10/30 12:19:49 - Spoon - Starting job... 2012/10/30 12:19:51 - Spoon - Job has ended.
    via by Slawomir Chodnicki,
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    • org.eclipse.swt.SWTException: Invalid thread access at org.eclipse.swt.SWT.error(SWT.java:2691) at org.eclipse.swt.SWT.error(SWT.java:2616) at org.eclipse.swt.SWT.error(SWT.java:2587) at org.eclipse.swt.widgets.Widget.error(Widget.java:381) at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:284) at org.eclipse.swt.widgets.Dialog.checkParent(Dialog.java:154) at org.eclipse.swt.widgets.Dialog.<init>(Dialog.java:116) at org.eclipse.swt.widgets.MessageBox.<init>(MessageBox.java:81) at gui.DialogFactory.showError(DialogFactory.java:33) at threads.DownloadServer.run(DownloadServer.java:22) at java.lang.Thread.run(Thread.java)

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