Is writing from several JVM to same location at same time supported?

[toiv...@gmail.com]

Journal.IO looks great.

Possibly i am trying to misuse it.
Is writing from several JVM to same location at same time supported?
Experiment shows what I can write from 2 JVM at same time, but journal get corrupted and later opening for reading fails.
Different exceptions occurs, for example:
 

Exception in thread "main" java.io.EOFException

      at java.io.RandomAccessFile.readFully(Unknown Source)

      at java.io.RandomAccessFile.readFully(Unknown Source)

      at journal.io.api.DataFileAccessor.readLocationData(DataFileAccessor.java:355)

      at journal.io.api.DataFileAccessor.readNextLocationDetails(DataFileAccessor.java:180)

      at journal.io.api.Journal.goToNextLocation(Journal.java:747)

      at journal.io.api.Journal.recoveryCheck(Journal.java:842)

      at journal.io.api.Journal.open(Journal.java:204)

thank you
toivo

 

[Sergio Bossa]

Hi Toivo,

writing from multiple JVMs to the same journal isn't currently supported.

Regards,

Sergio B.

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Sergio Bossa
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[toiv...@gmail.com]

Thank you for quick reply

We are building new system which contains several nodes in cluster.
Each node use separate JVM.
It seems what each node needs its own reliable event journal (based on Journal.IO)

And additionally we need some sort of distributed logging which aggregates all information from all nodes together.
Maybe Apache Kafka which isnt as reliable as Journal.IO

I am very grateful for any ideas or comments.

toivo