GitHub user wi101 opened a pull request:
https://github.com/apache/cassandra/pull/223
changed memtable_flush_writers value
If we work in Client Mode, and `memtable_flush_writers = 0` there is a
problem with `ColumnFamilyStore` when we want to add Tables & views. There is
an `java.lang.IllegalArgumentException` because of the `flushExecutor`
in `JMXEnabledThreadPoolExecutor:68` the `maxPoolSize` is equal to
`corePoolSize`. This exception is caused by `java.lang.IllegalArgumentException
at java.util.concurrent.ThreadPoolExecutor.<init>(ThreadPoolExecutor.java:1314)
... `
`maximumPoolSize <= 0 ` and in our case `maximumPoolSize == corePoolSize
== 0`
I changed the value of `memtable_flush_writers` to 1 because in
`DatabaseDescriptor:560` the is this condition:
```
if (conf.memtable_flush_writers == 0)
{
conf.memtable_flush_writers = conf.data_file_directories.length
== 1 ? 2 : 1;
}
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wi101/cassandra trunk
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/cassandra/pull/223.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #223
----
commit e3d6020fd81cc4d54f71add907ed73b0f8a62d31
Author: Wiem Zine El Abidine <wiemzin@...>
Date: 2018-05-07T16:09:24Z
changed memtable_flush_writers value
If we work in Client Mode, and `memtable_flush_writers = 0` there is a
problem with `ColumnFamilyStore` when we want to add Tables & views. There is
an `java.lang.IllegalArgumentException` because of the `flushExecutor`
in `JMXEnabledThreadPoolExecutor:68` the `maxPoolSize` is equal to
`corePoolSize`. This exception is caused by `java.lang.IllegalArgumentException
at java.util.concurrent.ThreadPoolExecutor.<init>(ThreadPoolExecutor.java:1314)
... `
`maximumPoolSize <= 0 ` and in our case `maximumPoolSize == corePoolSize
== 0`
I changed the value of `memtable_flush_writers` to 1 because in
`DatabaseDescriptor:560` the is this condition:
```
if (conf.memtable_flush_writers == 0)
{
conf.memtable_flush_writers = conf.data_file_directories.length
== 1 ? 2 : 1;
}
```
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