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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://issues.shibboleth.net/jira/browse/IDP" style="color: #3b73af; text-decoration: none">Identity Provider</a> / <a href="https://issues.shibboleth.net/jira/browse/IDP-1696" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-0804cc0e-f8c8-4754-9250-d1c1c51a2b31" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://issues.shibboleth.net/jira/browse/IDP-1696" style="color: #3b73af; text-decoration: none">IDP-1696</a> </td>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://issues.shibboleth.net/jira/browse/IDP-1696" style="color: #3b73af; text-decoration: none">0 byte backingFile causes IDP initialization to fail</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-0804cc0e-f8c8-4754-9250-d1c1c51a2b31" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 3.4.7 </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Spring </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 20/Oct/20 5:21 PM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">Windows 2008 or 2019, JDK (any version), Tomcat 9, and the latest 3.x IDP release. </p> </td>
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> metadata </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-critical-e9183ab6-4de0-4d32-9bba-ff774b286287" height="16" width="16" border="0" align="absmiddle" alt="Critical" style="vertical-align: text-bottom"> Critical </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="7d94a8ca70b71ea2c8c72efa32c3a634877f35df1f37a28d43d73e8902d06175@https://login.idp.eduid.se/idp.xml" id="email_7d94a8ca70b71ea2c8c72efa32c3a634877f35df1f37a28d43d73e8902d06175@https://login.idp.eduid.se/idp.xml" href="https://issues.shibboleth.net/jira/secure/ViewProfile.jspa?name=7d94a8ca70b71ea2c8c72efa32c3a634877f35df1f37a28d43d73e8902d06175%40https%3A%2F%2Flogin.idp.eduid.se%2Fidp.xml" style="color:#0052cc;; color: #3b73af; text-decoration: none">7d94a8ca70b71ea2c8c72efa32c3a634877f35df1f37a28d43d73e8902d06175@https://login.idp.eduid.se/idp.xml</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">When there is drive full condition and the FileBackedHTTPMetadataProvider attempts to download and save the backingFile it will leave a 0 byte (empty file) on the filesystem. The next time the IDP tries to start it will fail to initialize because the IDP is reading the backingFile expecting that it is XML and the XML parser throws an exception thats not being caught. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Arguably there are probably two bugs here. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">1) The IDP should probably validate the backingFile is valid rather than leaving a 0 byte xml on the filesystem. There's a number of ways this could be handled, but the easiest would probably just be to download the backingFile to the same location with a .staging extension, validate it then replace the backingFile. Another approach would be to rename the backingFile, then download a new one, validate it, and if validation fails put the old file back so you don't leave the IDP in a bad state. The problem with the second approach is that if the time is just right and the filesystem happened to fill up after you renamed it then you might not be able to put it back, but the same is probably true for the first if timing is just right. Honestly I don't even understand how a 0 byte file is getting created to begin with because if the drive is full I would argue you shouldn't even be able to create a file, unless the code is creating a 0 byte file on purpose and adding the XML to it as a second step. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">2) The code that is loading the backingFile during the IDP initialization should capture the exception being thrown when the backingFile is not valid XML and either log a helpful message stating that the backingFile is corrupt, or better yet it should proactively try to rectify the situation by attempting to redownload the file and if it can't because the drive is full or permissions issues then log why it can't be fixed. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I don't think you need to create a drive full situation to reproduce the problem. You can probably just follow the instructions here <a href="https://www.fortypoundhead.com/showcontent.asp?artid=23907" class="external-link" target="_blank" rel="nofollow noopener" style="color: #3b73af; text-decoration: none">https://www.fortypoundhead.com/showcontent.asp?artid=23907</a> to create a zero byte file, then replace the backingFile with it and restart the IDP. </p> </td>
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