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Re: [platform-webdav-dev] Q about thread safety of Eclipse WebDAV
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No, there has been no new work (and no thread safety code review) of the
WebDAV code for 3.0.
platform-webdav-dev-admin@xxxxxxxxxxx wrote on 04/30/2004 08:23:37 PM:
>
> Is org.eclipse.webdav.client.RemoteDAVClient supposed to be thread-safe?
>
> When I call methods on the same instance of RemoteDAVClient from
different
> threads, I've been getting java.io.IOException: Malformed status line.:
>
> java.io.IOException: Malformed status line.
> at
> org.eclipse.webdav.http.client.HttpConnection.
> readServerResponse(HttpConnection.java:1139)
> at
> org.eclipse.webdav.http.client.HttpConnection.
> access$4(HttpConnection.java:1133)
> at
> org.eclipse.webdav.http.client.HttpConnection$CachedOutputStream.
> close(HttpConnection.java:594)
> at
> org.eclipse.webdav.http.client.HttpClient.invoke2(HttpClient.java:912)
> at
> org.eclipse.webdav.http.client.HttpClient.invoke1(HttpClient.java:769)
> at
> org.eclipse.webdav.http.client.HttpClient.invoke1(HttpClient.java:826)
> at
> org.eclipse.webdav.http.client.HttpClient.invoke(HttpClient.java:752)
> at
> org.eclipse.webdav.client.RemoteDAVClient.
> proppatch(RemoteDAVClient.java:465)
> at
> MalformedStatusLineBug.createContact(MalformedStatusLineBug.java:138)
> at MalformedStatusLineBug.run(MalformedStatusLineBug.java:46)
>
> Also, many assertions fail. I'm attaching the entire output of a sample
> run:
>
> (See attached file: MalformedStatusLineOutput.txt)
>
> Attached is a simple program that reproduces the exception:
>
> (See attached file: MalformedStatusLineException.java)
>
> The program takes a single command-line argument specifying the number of
> threads to be created. If only 1 thread is created, everything works
fine.
> However, if more than 1 thread is created, the exception usually occurs.
>
> I've also seen the exception occur with a (slightly) different call
stack,
> but I don't have a simple standalone test case that replicates that exact
> version of the problem. In this case, the exception also occurs in the
> readServerResponse() method of the
> org.eclipse.webdav.http.client.HttpConnection class. Here is the entire
> call stack of that thread:
>
> Thread [Connections Recycler] (Suspended (exception IOException))
> HttpConnection.readServerResponse() line: 1139
> HttpConnection.access$4(HttpConnection) line: 1133
> HttpConnection$CachedOutputStream.close() line: 594
> HttpConnection.endRequest() line: 730
> HttpConnection.close() line: 674
> HttpClient$ConnectionsRecycler.recycle() line: 334
> HttpClient$ConnectionsRecycler.run() line: 350[attachment
> "MalformedStatusLineOutput.txt" deleted by DJ Houghton/Ottawa/IBM]
> [attachment "MalformedStatusLineException.java" deleted by DJ
> Houghton/Ottawa/IBM]
