OverlappingFileLockException error for BaseX version 9.2.4
Thursday, 2 July 2020 · 2 messages
PB
Pham Huu Bang2 Jul 2020 11:00 #
Hello,
I have a Java web application which relies on BaseX library to mostly read XML files (they are quite big, e.g: 20 MB per file) by XQuery. The XQuery is also quite complicated. It takes ~3 seconds to query. Configuration file .basex: https://pastebin.com/3EH7MJi5
I got the error below when multiple requests are processed in parallel. I wonder how BaseX can work in this case without error like this?
Thanks,
Version: BaseX 9.2.4
Java: Oracle Corporation, 1.8.0_222
OS: Linux, amd64
Stack Trace:
java.nio.channels.OverlappingFileLockException
at sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255)
at sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152)
at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1107)
at org.basex.io.random.TableDiskAccess.lock(TableDiskAccess.java:147)
at org.basex.io.random.TableDiskAccess.<init>(TableDiskAccess.java:79)
at org.basex.data.DiskData.init(DiskData.java:125)
at org.basex.data.DiskData.<init>(DiskData.java:84)
at org.basex.core.cmd.Open.open(Open.java:99)
at org.basex.core.cmd.Open.run(Open.java:48)
at org.basex.core.Command.run(Command.java:257)
at org.basex.core.Command.execute(Command.java:93)
at org.basex.core.Command.execute(Command.java:116)CG
Christian Grün2 Jul 2020 11:54 #
Hi Pham,
If you use BaseX with Java, you should either work with the
Client/Server architecture (see [1] for examples) or ensure that all operations are based on and registered via the same database context (Context.java). Feel free to share a minimum Java example with us.
Best,
Christian
[1] https://docs.basex.org/wiki/Java_Examples
Quoted text · Pham Huu Bang · 28 lines
On Thu, Jul 2, 2020 at 11:01 AM Pham Huu Bang <a09550 at gmail.com> wrote: > > Hello, > > I have a Java web application which relies on BaseX library to mostly read XML files (they are quite big, e.g: 20 MB per file) by XQuery. The XQuery is also quite complicated. It takes ~3 seconds to query. Configuration file .basex: https://pastebin.com/3EH7MJi5 > > I got the error below when multiple requests are processed in parallel. > I wonder how BaseX can work in this case without error like this? > > Thanks, > > Version: BaseX 9.2.4 > Java: Oracle Corporation, 1.8.0_222 > OS: Linux, amd64 > Stack Trace: > java.nio.channels.OverlappingFileLockException > at sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255) > at sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152) > at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1107) > at org.basex.io.random.TableDiskAccess.lock(TableDiskAccess.java:147) > at org.basex.io.random.TableDiskAccess.<init>(TableDiskAccess.java:79) > at org.basex.data.DiskData.init(DiskData.java:125) > at org.basex.data.DiskData.<init>(DiskData.java:84) > at org.basex.core.cmd.Open.open(Open.java:99) > at org.basex.core.cmd.Open.run(Open.java:48) > at org.basex.core.Command.run(Command.java:257) > at org.basex.core.Command.execute(Command.java:93) > at org.basex.core.Command.execute(Command.java:116)
Written for BaseX 9.3. BaseX may have changed since: please check the current documentation.
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