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https://issues.apache.org/jira/browse/LUCENENET-357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12859452#action_12859452
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Robert Jordan commented on LUCENENET-357:
-----------------------------------------
The WeakReference issue is caused by
SupportClass:
class WeakKey : WeakReference
WeakReference is declared with
[SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags =
SecurityPermissionFlag.UnmanagedCode)]
which basically means that a subclass (here: WeakKey) must be implemented in an
assembly with unmanaged code permissions.
This rules out medium trust.
> Mostly won't work on shared hosts / Mosso cloud etc due to 'Trust' levels
> -------------------------------------------------------------------------
>
> Key: LUCENENET-357
> URL: https://issues.apache.org/jira/browse/LUCENENET-357
> Project: Lucene.Net
> Issue Type: Bug
> Environment: .NET 3.5 / Medium or Medium modified trust
> Reporter: Frank West
>
> Initially I had to remove a few references to the Sys Environment to get it
> to work. However now it fails use of the 'Weak Hashtable' - any reference to
> a 'weak[something]' will fail with a security exception. The issue only
> happens when returning sorted results.
> As an example here's the web.config modified trust file I'm being forced to
> use on Mosso (Rackspace cloud)
> <configuration>
> <mscorlib>
> <security>
> <policy>
> <PolicyLevel version="1">
> <SecurityClasses>
> <SecurityClass Name="AllMembershipCondition"
> Description="System.Security.Policy.AllMembershipCondition, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="AspNetHostingPermission"
> Description="System.Web.AspNetHostingPermission, System, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="ConfigurationPermission"
> Description="System.Configuration.ConfigurationPermission,
> System.Configuration, Version=2.0.0.0, Culture=neutral,
> PublicKeyToken=b03f5f7f11d50a3a"/>
> <SecurityClass Name="DnsPermission"
> Description="System.Net.DnsPermission, System, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="EnvironmentPermission"
> Description="System.Security.Permissions.EnvironmentPermission, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="FileIOPermission"
> Description="System.Security.Permissions.FileIOPermission, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="FirstMatchCodeGroup"
> Description="System.Security.Policy.FirstMatchCodeGroup, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="IsolatedStorageFilePermission"
> Description="System.Security.Permissions.IsolatedStorageFilePermission,
> mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="NamedPermissionSet"
> Description="System.Security.NamedPermissionSet"/>
> <SecurityClass Name="PrintingPermission"
> Description="System.Drawing.Printing.PrintingPermission, System.Drawing,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
> <SecurityClass Name="SecurityPermission"
> Description="System.Security.Permissions.SecurityPermission, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="SmtpPermission"
> Description="System.Net.Mail.SmtpPermission, System, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="SqlClientPermission"
> Description="System.Data.SqlClient.SqlClientPermission, System.Data,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="StrongNameMembershipCondition"
> Description="System.Security.Policy.StrongNameMembershipCondition, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="UIPermission"
> Description="System.Security.Permissions.UIPermission, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="UnionCodeGroup"
> Description="System.Security.Policy.UnionCodeGroup, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="UrlMembershipCondition"
> Description="System.Security.Policy.UrlMembershipCondition, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="WebPermission"
> Description="System.Net.WebPermission, System, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="ZoneMembershipCondition"
> Description="System.Security.Policy.ZoneMembershipCondition, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="ReflectionPermission"
> Description="System.Security.Permissions.ReflectionPermission, mscorlib,
> Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="OleDbPermission"
> Description="System.Data.OleDb.OleDbPermission, System.Data, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="OdbcPermission"
> Description="System.Data.Odbc.OdbcPermission, System.Data, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> <SecurityClass Name="SocketPermission"
> Description="System.Net.SocketPermission, System, Version=2.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
> </SecurityClasses>
> <NamedPermissionSets>
> <PermissionSet class="NamedPermissionSet" version="1"
> Unrestricted="true" Name="FullTrust" Description="Allows full access to all
> resources"/>
> <PermissionSet class="NamedPermissionSet" version="1"
> Name="Nothing" Description="Denies all resources, including the right to
> execute"/>
> <PermissionSet class="NamedPermissionSet" version="1"
> Name="ASP.Net">
> <IPermission class="AspNetHostingPermission" version="1"
> Level="Medium"/>
> <IPermission class="ConfigurationPermission" version="1"
> Unrestricted="true"/>
> <IPermission class="DnsPermission" version="1"
> Unrestricted="true"/>
> <IPermission class="EnvironmentPermission" version="1"
> Read="TEMP;TMP;USERNAME;OS;COMPUTERNAME"/>
> <IPermission class="FileIOPermission" version="1"
> Read="$AppDir$" Write="$AppDir$" Append="$AppDir$" PathDiscovery="$AppDir$"/>
> <IPermission class="IsolatedStorageFilePermission" version="1"
> Allowed="AssemblyIsolationByUser" UserQuota="9223372036854775807"/>
> <!-- <IPermission class="PrintingPermission" version="1"
> Level="DefaultPrinting"/> -->
> <IPermission class="SecurityPermission" version="1"
> Flags="Assertion, Execution, ControlThread, ControlPrincipal,
> RemotingConfiguration"/>
> <IPermission class="SmtpPermission" version="1"
> Access="ConnectToUnrestrictedPort"/>
> <IPermission class="SqlClientPermission" version="1"
> Unrestricted="true"/>
> <IPermission class="WebPermission" version="1"
> Unrestricted="true"/>
> <IPermission class="OleDbPermission" version="1"
> Unrestricted="true"/>
> <IPermission class="OdbcPermission" version="1"
> Unrestricted="true"/>
> <IPermission class="SocketPermission" version="1"
> Unrestricted="true" />
> <IPermission class="ReflectionPermission" version="1"
> Unrestricted="true"/>
> </PermissionSet>
> </NamedPermissionSets>
> <CodeGroup class="FirstMatchCodeGroup" version="1"
> PermissionSetName="Nothing">
> <IMembershipCondition class="AllMembershipCondition" version="1"/>
> <CodeGroup class="UnionCodeGroup" version="1"
> PermissionSetName="ASP.Net">
> <IMembershipCondition class="UrlMembershipCondition"
> version="1" Url="$AppDirUrl$/*"/>
> </CodeGroup>
> <CodeGroup class="UnionCodeGroup" version="1"
> PermissionSetName="ASP.Net">
> <IMembershipCondition class="UrlMembershipCondition"
> version="1" Url="$CodeGen$/*"/>
> </CodeGroup>
> <CodeGroup class="UnionCodeGroup" version="1"
> PermissionSetName="Nothing">
> <IMembershipCondition class="ZoneMembershipCondition"
> version="1" Zone="MyComputer"/>
> <CodeGroup class="UnionCodeGroup" version="1"
> PermissionSetName="FullTrust" Name="Microsoft_Strong_Name" Description="This
> code group grants code signed with the Microsoft strong name full trust. ">
> <IMembershipCondition class="StrongNameMembershipCondition"
> version="1"
> PublicKeyBlob="002400000480000094000000060200000024000052534131000400000100010007D1FA57C4AED9F0A32E84AA0FAEFD0DE9E8FD6AEC8F87FB03766C834C99921EB23BE79AD9D5DCC1DD9AD236132102900B723CF980957FC4E177108FC607774F29E8320E92EA05ECE4E821C0A5EFE8F1645C4C0C93C1AB99285D622CAA652C1DFAD63D745D6F2DE5F17E5EAF0FC4963D261C8A12436518206DC093344D5AD293"/>
> </CodeGroup>
> <CodeGroup class="UnionCodeGroup" version="1"
> PermissionSetName="FullTrust" Name="Ecma_Strong_Name" Description="This code
> group grants code signed with the ECMA strong name full trust. ">
> <IMembershipCondition class="StrongNameMembershipCondition"
> version="1" PublicKeyBlob="00000000000000000400000000000000"/>
> </CodeGroup>
> </CodeGroup>
> </CodeGroup>
> </PolicyLevel>
> </policy>
> </security>
> </mscorlib>
> </configuration>
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