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https://issues.apache.org/jira/browse/GUACAMOLE-620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16608546#comment-16608546
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Changkun Ou commented on GUACAMOLE-620:
---------------------------------------
[~nick.couch...@yahoo.com] Thanks, I will digging more info.
It's a self written servlet, as far as I know it is almost as same as official
one except authentication part.
> User input thread automatically exit with an instruction parse error
> --------------------------------------------------------------------
>
> Key: GUACAMOLE-620
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-620
> Project: Guacamole
> Issue Type: Bug
> Components: libguac
> Affects Versions: 0.9.14
> Reporter: Changkun Ou
> Priority: Minor
>
> Remote desktop protocol: RDP
> User experience:
> A user operates a few minutes, then the desktop display froze. A browser
> refresh can connect to the server desktop again.
> Under the hood:
> Observed `guacd` log shows the user is disconnected.
> A warning level log shows that {{guac_user_input_thread}} automatically exit
> with an instruction parser error:
> {code}
> Guacamole connection failure: Instruction parse error
> {code}
> Here is a happening context captured in a browser, where the server sends
> {{10.disconnect}} since last {{sync}} instruction:
>
> {code}
> server: 4.sync,8.24744179;
> client: 4.sync,8.24744179;
> client: 5.mouse,3.667,3.459,1.1;
> client: 5.mouse,3.627,3.470,1.1;
> client: 5.mouse,3.597,3.470,1.1;
> client: 5.mouse,3.493,3.442,1.1;
> server: 4.copy,1.0,3.241,3.368,3.617,3.355,2.14,1.0,1.0,3.377;
> server: 4.copy,1.0,3.241,3.366,3.616,1.2,2.14,1.0,1.0,3.375;
> server: 4.copy,1.0,3.241,3.365,3.615,1.1,2.14,1.0,1.0,3.374;
> server: 4.copy,1.0,3.241,3.364,3.613,1.1,2.14,1.0,1.0,3.373;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.220,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.284,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.348,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.412,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.476,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.540,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.604,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.668,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.732,3.364;
> server: 4.copy,4.-113,1.0,1.0,2.58,1.1,2.14,1.0,3.796,3.364;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.218,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.282,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.346,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.410,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.474,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.538,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.602,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.666,3.365;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.730,3.365;
> server: 4.copy,4.-114,1.0,1.0,2.62,1.1,2.14,1.0,3.794,3.365;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.217,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.281,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.345,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.409,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.473,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.537,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.601,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.665,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.729,3.366;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.793,3.366;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.216,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.280,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.344,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.408,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.472,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.536,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.600,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.664,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.728,3.368;
> server: 4.copy,4.-594,1.0,1.0,2.64,1.5,2.14,1.0,3.792,3.368;
> server: 3.img,1.3,2.14,1.0,9.image/png,3.856,3.368;
> server:
> 4.blob,1.3,112.iVBORw0KGgoAAAANSUhEUgAAAAIAAAAFAQMAAABVfa/fAAAAA1BMVEUQIDF/BroyAAAAC0lEQVQImWNggAEAAAoAAWeL7ekAAAAASUVORK5CYII=;
> server: 3.end,1.3;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.613,3.373;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.677,3.373;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.741,3.373;
> server: 4.copy,4.-634,1.0,1.0,2.53,1.1,2.14,1.0,3.805,3.373;
> server: 4.copy,4.-634,1.0,1.0,2.53,1.1,2.14,1.0,3.805,3.373;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.679,3.374;
> server: 4.copy,3.-25,1.0,1.0,2.64,1.1,2.14,1.0,3.743,3.374;
> server: 4.copy,4.-635,1.0,1.0,2.51,1.1,2.14,1.0,3.807,3.374;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.616,3.375;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.680,3.375;
> server: 4.copy,3.-26,1.0,1.0,2.64,1.2,2.14,1.0,3.744,3.375;
> server: 4.copy,4.-639,1.0,1.0,2.50,1.2,2.14,1.0,3.808,3.375;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.617,3.377;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.681,3.377;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.745,3.377;
> server: 4.copy,4.-636,1.0,1.0,2.49,2.63,2.14,1.0,3.809,3.377;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.617,3.440;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.681,3.440;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.745,3.440;
> server: 4.copy,4.-636,1.0,1.0,2.49,2.63,2.14,1.0,3.809,3.440;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.617,3.503;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.681,3.503;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.745,3.503;
> server: 4.copy,4.-636,1.0,1.0,2.49,2.63,2.14,1.0,3.809,3.503;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.617,3.566;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.681,3.566;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.745,3.566;
> server: 4.copy,4.-636,1.0,1.0,2.49,2.63,2.14,1.0,3.809,3.566;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.617,3.629;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.681,3.629;
> server: 4.copy,2.-4,1.0,1.0,2.64,2.63,2.14,1.0,3.745,3.629;
> server: 4.copy,4.-636,1.0,1.0,2.49,2.63,2.14,1.0,3.809,3.629;
> server: 4.copy,4.-822,1.0,1.0,2.64,2.40,2.14,1.0,3.617,3.692;
> server: 4.copy,4.-822,1.0,1.0,2.64,2.40,2.14,1.0,3.681,3.692;
> server: 4.copy,4.-822,1.0,1.0,2.64,2.40,2.14,1.0,3.745,3.692;
> server: 3.img,1.3,2.14,1.0,9.image/png,3.809,3.692;
> server:
> 4.blob,1.3,116.iVBORw0KGgoAAAANSUhEUgAAADEAAAAoAQMAAABti4AMAAAAA1BMVEUQIDF/BroyAAAADUlEQVQYlWNgGAWUAAABQAABuwBcGQAAAABJRU5ErkJggg==;
> server: 3.end,1.3;
> server: 4.sync,8.24744258;
> server: 7.dispose,5.-1017;
> server: 10.disconnect;
> client: 10.disconnect;
> {code}
>
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