Hi there,The log files would be useful to know what the server was doing at the time and to see the stacktraces. The ideal is a complete, minimal example which we can use to investigate. Without a runnable setup, its a bit harder to investigate.
Some questions to help me understand what is happening:What does the the code in pan-dora/ldp-client is do? If it is concurrent operations, what else is the client doing at the time?
Does it work if you go back to 3.4.0 after using 3.5.0 where it went wrong? What's the Fuseki server configuration?What's the history of the TDB database? How long ago was it created and has it been used outside of Fuseki or in different Fuseki configurations?
JENA-1482 (which isn't in a released version of Jena) is a few diagnostics to catch error situations earlier.
Andy
On 30/03/18 07:06, Christopher Johnson wrote:
Hi list, I apologize, but on further evaluation, I have determined that it definitely works in 3.4.0 but not in 3.5.0. So, the scope of changes (since 2017 July) is a bit broader. Also, for reference, here is a link to the client method <https://github.com/pan-dora/ldp-client/blob/master/src/main/java/cool/pandora/ldpclient/LdpClientImpl.java#L875-L879>. If you need detailed server logs, please let me know. Christopher Johnson Scientific Associate Universitätsbibliothek Leipzig On 30 March 2018 at 07:08, Christopher Johnson <[email protected]> wrote:Hi list, I am developing a client that writes asynchronously to Fuseki via TrellisLDP <https://github.com/trellis-ldp/trellis>. There seems to be an issue since 3.6.0 that throws a BindingTBD error. The exception is this:fuseki | [2018-03-27 17:02:44] BindingTDB ERROR get1(?parent) fuseki | java.nio.BufferOverflowException fuseki | at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:214) fuseki | at sun.nio.ch.IOUtil.read(IOUtil.java:200)I looked at the code in BindingTBD and reverted the change in JENA-1482: tests for null NodeIds at the TDB level" to see if a different result would occur. Now it throws this exception:fuseki | [2018-03-30 03:39:34] BindingTDB ERROR get1(?object) fuseki | org.apache.jena.tdb.base.file.FileException: In the middle of an alloc-write fuseki | at org.apache.jena.tdb.base.objectfile.ObjectFileStorage. read(ObjectFileStorage.java:311)This looks like a concurrency issue. I do not know why it works in 3.5.0. Any ideas? Thank you for your consideration of this. Christopher Johnson Scientific Associate Universitätsbibliothek Leipzig
