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From "Jeff Jirsa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-13072) Cassandra failed to run on Linux-aarch64
Date Wed, 31 May 2017 13:01:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16031109#comment-16031109
] 

Jeff Jirsa commented on CASSANDRA-13072:
----------------------------------------

The problem is that to enable a new platform you put at risk hundreds or thousands of existing
users that may be running 2.2, if there's some unreported bug or hidden incompatibility  in
jna. Even if there's no bug, you're causing users to re-validate their deployment which is
nontrivial (our testing isn't good enough for users with thousands of nodes to be sure that
they won't have issues we didn't catch, this is a real step for most production deployments).

The pragmatic approach is not changing a library in 2.2, since it's been this way (unsupported)
for 2 years since its release



> Cassandra failed to run on Linux-aarch64
> ----------------------------------------
>
>                 Key: CASSANDRA-13072
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13072
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Hardware: ARM aarch64
> OS: Ubuntu 16.04.1 LTS
>            Reporter: Jun He
>            Assignee: Benjamin Lerer
>              Labels: incompatible
>         Attachments: compat_report.html
>
>
> Steps to reproduce:
> 1. Download cassandra latest source
> 2. Build it with "ant"
> 3. Run with "./bin/cassandra". Daemon is crashed with following error message:
> {quote}
> INFO  05:30:21 Initializing system.schema_functions
> INFO  05:30:21 Initializing system.schema_aggregates
> ERROR 05:30:22 Exception in thread Thread[MemtableFlushWriter:1,5,main]
> java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native
>         at org.apache.cassandra.utils.memory.MemoryUtil.allocate(MemoryUtil.java:97)
~[main/:na]
>         at org.apache.cassandra.io.util.Memory.<init>(Memory.java:74) ~[main/:na]
>         at org.apache.cassandra.io.util.SafeMemory.<init>(SafeMemory.java:32) ~[main/:na]
>         at org.apache.cassandra.io.compress.CompressionMetadata$Writer.<init>(CompressionMetadata.java:316)
~[main/:na]
>         at org.apache.cassandra.io.compress.CompressionMetadata$Writer.open(CompressionMetadata.java:330)
~[main/:na]
>         at org.apache.cassandra.io.compress.CompressedSequentialWriter.<init>(CompressedSequentialWriter.java:76)
~[main/:na]
>         at org.apache.cassandra.io.util.SequentialWriter.open(SequentialWriter.java:163)
~[main/:na]
>         at org.apache.cassandra.io.sstable.format.big.BigTableWriter.<init>(BigTableWriter.java:73)
~[main/:na]
>         at org.apache.cassandra.io.sstable.format.big.BigFormat$WriterFactory.open(BigFormat.java:93)
~[main/:na]
>         at org.apache.cassandra.io.sstable.format.SSTableWriter.create(SSTableWriter.java:96)
~[main/:na]
>         at org.apache.cassandra.io.sstable.SimpleSSTableMultiWriter.create(SimpleSSTableMultiWriter.java:114)
~[main/:na]
>         at org.apache.cassandra.db.compaction.AbstractCompactionStrategy.createSSTableMultiWriter(AbstractCompactionStrategy.java:519)
~[main/:na]
>         at org.apache.cassandra.db.compaction.CompactionStrategyManager.createSSTableMultiWriter(CompactionStrategyManager.java:497)
~[main/:na]
>         at org.apache.cassandra.db.ColumnFamilyStore.createSSTableMultiWriter(ColumnFamilyStore.java:480)
~[main/:na]
>         at org.apache.cassandra.db.Memtable.createFlushWriter(Memtable.java:439) ~[main/:na]
>         at org.apache.cassandra.db.Memtable.writeSortedContents(Memtable.java:371) ~[main/:na]
>         at org.apache.cassandra.db.Memtable.flush(Memtable.java:332) ~[main/:na]
>         at org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1054)
~[main/:na]
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
~[na:1.8.0_111]
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
~[na:1.8.0_111]
>         at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_111]
> {quote}
> Analyze:
> This issue is caused by bundled jna-4.0.0.jar which doesn't come with aarch64 native
support. Replace lib/jna-4.0.0.jar with jna-4.2.0.jar from http://central.maven.org/maven2/net/java/dev/jna/jna/4.2.0/
can fix this problem.
> Attached is the binary compatibility report of jna.jar between 4.0 and 4.2. The result
is good (97.4%). So is there possibility to upgrade jna to 4.2.0 in upstream? Should there
be any kind of tests to execute, please kindly point me. Thanks a lot.



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