QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
NFS falsely reports file size |
| Ref. No. |
QNX.000001431 |
| Category(ies) |
Network |
| Issue |
We are using a QNX client and QNX server. Between the two we are using NFS for file transfer and data sharing.
When the server wants the client to read a file, it sends a message telling the client the size of that file. The client does a seek() to about 7.5MB into the file and read() is notified of an EOF, so the client waits 5 seconds and then tries again. Why are we getting this error?
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| Solution |
There are a number things that could be causing this problem, a few of which could be the cache. Try the following suggestions to avoid this being a problem.
1. Do a stat() before seek() to confirm file size.
2. Try reading and writing the first byte back to flush the client cache.
3. Have the client sleep for 6 seconds instead, cache can take up to 5 seconds to update. |
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