intermittent error calling .NET web service

[Eddie J]

I'm getting an intermittent error when calling a .NET web service from a .NET
console application. Both are using v.1.1.4322 of the framework.

Any ideas on what could be causing this? It can fail and then a few seconds
later can work fine.

The exception is:

<log4net:event logger="WRDataSyncApp"
timestamp="2005-01-11T03:00:49.7336956-05:00" level="ERROR" thread="5808"
domain="WRDataSyncApp.exe"
username="CLT01IAWEB010N0\EquityAdmin"><log4net:me ssage>Exception:
System.InvalidOperationException
Message: There is an error in XML document (1, 290).
Source: System.Xml
at System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader
xmlReader, String encodingStyle)
at System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader xmlReader)
at
System.Web.Services.Protocols.SoapHttpClientProtoc ol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtoc ol.Invoke(String
methodName, Object[] parameters)
at DataSynchronization.ConferenceScheduler.GetAllRegi strations(String
UserName, String Password)
at DataSynchronization.RegistrationSyncable.AddWRData ToDataSet(DataSet
ds, ConferenceScheduler webSrvc)
at DataSynchronization.WRDataSync.SynchronizeData()
at WRDataSyncApp.Main(String[] args)

Nested Exception

Exception: System.ArgumentOutOfRangeException
Message: Non-negative number required.
Parameter name: byteCount
Source: mscorlib
at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32
byteCount, Char[] chars, Int32 charIndex, UTF8Decoder decoder)
at System.Text.UTF8Decoder.GetChars(Byte[] bytes, Int32 byteIndex, Int32
byteCount, Char[] chars, Int32 charIndex)
at System.IO.StreamReader.ReadBuffer(Char[] userBuffer, Int32 userOffset,
Int32 desiredChars, Boolean& readToUserBuffer)
at System.IO.StreamReader.Read(Char[] buffer, Int32 index, Int32 count)
at System.Xml.XmlScanner.Read()
at System.Xml.XmlScanner.ScanEscape()
at System.Xml.XmlScanner.ScanContent()
at System.Xml.XmlTextReader.ParseBeginTagExpandCharEn tities()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlReader.ReadElementString()
at
Microsoft.Xml.Serialization.GeneratedAssembly.XmlS erializationReader1.Read15_GetAllRegistrationsResp onse()

</log4net:message><log4net:locationInfo class="WRDataSyncApp" method="Main"
file="" line="0" /></log4net:event>

[Kevin Yu [MSFT]]

Hi,

First of all, I would like to confirm my understanding of your issue. From
your description, I understand that when you're referencing a webservice
from a console app, some exception was thrown. If there is any
misunderstanding, please feel free to let me know.

Could you let me know on which call did the exception thrown. Knowing the
client side code and webservice code will be helpful for me to help you
debugging on this issue.

Also, besides posting here, you can also try the
microsoft.public.dotnet.framework.aspnet.webservic es newsgroup, there are
more people who will answer this question there.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[Eddie J]

Your understanding of the issue is correct. The exception stack trace has the
answers to your other questions:

<log4net:event logger="WRDataSyncApp"
timestamp="2005-01-12T03:00:04.9038753-05:00" level="ERROR" thread="5876"
domain="WRDataSyncApp.exe"
username="CLT01IAWEB010N0\EquityAdmin"><log4net:me ssage>Exception:
System.Web.Services.Protocols.SoapException
Message: Exception or Violation Occurred.
Source: System.Web.Services
at
System.Web.Services.Protocols.SoapHttpClientProtoc ol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtoc ol.Invoke(String
methodName, Object[] parameters)
at DataSynchronization.ConferenceScheduler.GetAllAnal ysts(String
UserName, String Password)
at DataSynchronization.AnalystSyncable.AddWRDataToDat aSet(DataSet ds,
ConferenceScheduler webSrvc)
at DataSynchronization.WRDataSync.SynchronizeData()
at WRDataSyncApp.Main(String[] args)
</log4net:message><log4net:locationInfo class="WRDataSyncApp" method="Main"
file="" line="0" /></log4net:event>
<log4net:event logger="WRDataSyncApp"
timestamp="2005-01-12T14:00:30.5426304-05:00" level="ERROR" thread="5464"
domain="WRDataSyncApp.exe"
username="CLT01IAWEB010N0\EquityAdmin"><log4net:me ssage>Exception:
System.InvalidOperationException
Message: There is an error in XML document (1, 290).
Source: System.Xml
at System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader
xmlReader, String encodingStyle)
at System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader xmlReader)
at
System.Web.Services.Protocols.SoapHttpClientProtoc ol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtoc ol.Invoke(String
methodName, Object[] parameters)
at DataSynchronization.ConferenceScheduler.GetAllRegi strations(String
UserName, String Password)
at DataSynchronization.RegistrationSyncable.AddWRData ToDataSet(DataSet
ds, ConferenceScheduler webSrvc)
at DataSynchronization.WRDataSync.SynchronizeData()
at WRDataSyncApp.Main(String[] args)

Nested Exception

Exception: System.ArgumentOutOfRangeException
Message: Non-negative number required.
Parameter name: byteCount
Source: mscorlib
at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32
byteCount, Char[] chars, Int32 charIndex, UTF8Decoder decoder)
at System.Text.UTF8Decoder.GetChars(Byte[] bytes, Int32 byteIndex, Int32
byteCount, Char[] chars, Int32 charIndex)
at System.IO.StreamReader.ReadBuffer(Char[] userBuffer, Int32 userOffset,
Int32 desiredChars, Boolean& readToUserBuffer)
at System.IO.StreamReader.Read(Char[] buffer, Int32 index, Int32 count)
at System.Xml.XmlScanner.Read()
at System.Xml.XmlScanner.ScanEscape()
at System.Xml.XmlScanner.ScanContent()
at System.Xml.XmlTextReader.ParseBeginTagExpandCharEn tities()
at System.Xml.XmlTextReader.Read()
at System.Xml.XmlReader.ReadElementString()
at
Microsoft.Xml.Serialization.GeneratedAssembly.XmlS erializationReader1.Read15_GetAllRegistrationsResp onse()

</log4net:message><log4net:locationInfo class="WRDataSyncApp" method="Main"
file="" line="0" /></log4net:event>
"Kevin Yu [MSFT]" wrote:

Hi,

First of all, I would like to confirm my understanding of your issue. From
your description, I understand that when you're referencing a webservice
from a console app, some exception was thrown. If there is any
misunderstanding, please feel free to let me know.

Could you let me know on which call did the exception thrown. Knowing the
client side code and webservice code will be helpful for me to help you
debugging on this issue.

Also, besides posting here, you can also try the
microsoft.public.dotnet.framework.aspnet.webservic es newsgroup, there are
more people who will answer this question there.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[[MSFT]]

Hello,

From the error message, it seems the web method cannot accept the Argument
byteCount. Since the problem occurred randomly, is the value of byteCount
changed randomly? If we set same value for "byteCount", can the problem be
reproduce?

Luke

[Eddie J]

Thank you for the reply. "byteCount" is not a parameter of the web method I
am calling. The web method has two parameters: a user id and a password,
which are both, unfortunately, hard coded into the application, so there is
no possibility that they are not being supplied.

"[MSFT]" wrote:

Hello,

From the error message, it seems the web method cannot accept the Argument
byteCount. Since the problem occurred randomly, is the value of byteCount
changed randomly? If we set same value for "byteCount", can the problem be
reproduce?

Luke

[Eddie J]

One other thing: it would be helpful to know whether the read of the xml
failed on the server side or the client side. Can you determine that from the
exception stack trace?

"Eddie J" wrote:

Thank you for the reply. "byteCount" is not a parameter of the web method I
am calling. The web method has two parameters: a user id and a password,
which are both, unfortunately, hard coded into the application, so there is
no possibility that they are not being supplied.

"[MSFT]" wrote:

Hello,

From the error message, it seems the web method cannot accept the Argument
byteCount. Since the problem occurred randomly, is the value of byteCount
changed randomly? If we set same value for "byteCount", can the problem be
reproduce?

Luke

[Kevin Yu [MSFT]]

Hi,

We have replied to you on another thread in webservice newsgroup. Thanks!

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[[MSFT]]

From the Stack Trace, the problem occurred on client side. And the
response data from web service is in incorrect format. Is .NET framework
1.1 installed on both of your server and client?

Luke

[Eddie J]

I believe we have found a solution to the problem. The web service has
security features that prevent only certain IPs to call the web service. The
web service was also external to the the corporate network I work within.
When the call left the network, the IP address changed and would not be in
the range of acceptable IPs, but sometimes it would.

Thanks for your help on this issue. I appreciate your prompt responses.

"[MSFT]" wrote:

From the Stack Trace, the problem occurred on client side. And the
response data from web service is in incorrect format. Is .NET framework
1.1 installed on both of your server and client?

Luke

[[MSFT]]

Thank you for the update. I am very gald to hear the problem has been
resolved.

Luke