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Fix tj3d --webserver #322

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Fix tj3d --webserver #322

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7070ac3
Fix: Daemon stdio redirection fails on Ruby 3.4+
sanjayankur31 May 18, 2026
f38c602
Fix: ReportServlet StringIO buffers are read-only in web server context
sanjayankur31 May 18, 2026
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2 changes: 1 addition & 1 deletion lib/taskjuggler/daemon/Daemon.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,7 @@ def start

# We no longer have a controlling terminal, so these are useless.
$stdin.reopen('/dev/null')
$stdout.reopen(StringIO.new)
$stdout.reopen('/dev/null', 'a')
$stderr.reopen($stdout)

info('daemon_pid',
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9 changes: 7 additions & 2 deletions lib/taskjuggler/daemon/ReportServlet.rb
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Expand Up @@ -105,9 +105,13 @@ def generateReport(projectId, reportId, attributes)
# text from the report server. This buffer will contain the generated
# report as HTML encoded text. They will be send via DRb, so we have to
# extend them with DRbUndumped.
stdOut = StringIO.new('')
#
# Note: In Ruby 4.0+, StringIO.new('') unexpectedly creates a read-only
# buffer in the web server context. Using StringIO.new without arguments
# avoids this issue. Root cause not yet identified.
stdOut = StringIO.new
stdOut.extend(DRbUndumped)
stdErr = StringIO.new('')
stdErr = StringIO.new
stdErr.extend(DRbUndumped)

begin
Expand All @@ -119,6 +123,7 @@ def generateReport(projectId, reportId, attributes)
end

error('rs_io_connect_failed', "Can't connect IO: #{$!}")
return
end

# Ask the ReportServer to generate the reports with the provided ID.
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