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https://issues.apache.org/jira/browse/CASSANDRA-6413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13838642#comment-13838642
]
Mikhail Stepura edited comment on CASSANDRA-6413 at 12/4/13 6:29 AM:
---------------------------------------------------------------------
Silly me :) The bug is so obvious, but only manifests itself if both Key cache
AND row cache are enabled
{code:title=org.apache.cassandra.cache.AutoSavingCache.java|borderStyle=solid}
private void deleteOldCacheFiles()
{
File savedCachesDir = new
File(DatabaseDescriptor.getSavedCachesLocation());
if (savedCachesDir.exists() && savedCachesDir.isDirectory())
{
for (File file : savedCachesDir.listFiles())
{
if (file.isFile() &&
file.getName().endsWith(cacheType.toString()))
{
if (!file.delete())
logger.warn("Failed to delete {}",
file.getAbsolutePath());
}
if (file.isFile() &&
file.getName().endsWith(CURRENT_VERSION + ".db"))
{
if (!file.delete())
logger.warn("Failed to delete {}",
file.getAbsolutePath());
}
}
}
}
{code}
So, each cache deletes FILES FROM ALL CACHES from the {{saved_caches}} and then
happily writes its files.
The last save wins,
was (Author: mishail):
Silly me :) The bug is so obvious, but only manifests itself if both Key cache
AND row cache are enabled
{code:title=org.apache.cassandra.cache.AutoSavingCache.java|borderStyle=solid}
private void deleteOldCacheFiles()
{
File savedCachesDir = new
File(DatabaseDescriptor.getSavedCachesLocation());
if (savedCachesDir.exists() && savedCachesDir.isDirectory())
{
for (File file : savedCachesDir.listFiles())
{
if (file.isFile() &&
file.getName().endsWith(cacheType.toString()))
{
if (!file.delete())
logger.warn("Failed to delete {}",
file.getAbsolutePath());
}
if (file.isFile() &&
file.getName().endsWith(CURRENT_VERSION + ".db"))
{
if (!file.delete())
logger.warn("Failed to delete {}",
file.getAbsolutePath());
}
}
}
}
{code}
So, each cache deletes FILES FROM ALL CACHES from the {{saved_caches}} and then
happily writes its own single file.
The last save wins,
> Saved KeyCache prints success to log; but no file present
> ---------------------------------------------------------
>
> Key: CASSANDRA-6413
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6413
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: 1.2.11
> Reporter: Chris Burroughs
> Assignee: Mikhail Stepura
>
> Cluster has a single keyspace with 3 CFs. All used to have ROWS_ONLY, two
> were switched to KEYS_ONLY about 2 days ago. Row cache continues to save
> fine, but there is no saved key cache file present on any node in the cluster.
> {noformat}
> 6925: INFO [CompactionExecutor:12] 2013-11-27 10:12:02,284
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 118 ms
> 6941:DEBUG [CompactionExecutor:14] 2013-11-27 10:17:02,163
> AutoSavingCache.java (line 233) Deleting old RowCache files.
> 6942: INFO [CompactionExecutor:14] 2013-11-27 10:17:02,310
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 146 ms
> 8745:DEBUG [CompactionExecutor:6] 2013-11-27 10:37:25,140
> AutoSavingCache.java (line 233) Deleting old RowCache files.
> 8746: INFO [CompactionExecutor:6] 2013-11-27 10:37:25,283
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 143 ms
> 8747:DEBUG [CompactionExecutor:6] 2013-11-27 10:37:25,283
> AutoSavingCache.java (line 233) Deleting old KeyCache files.
> 8748: INFO [CompactionExecutor:6] 2013-11-27 10:37:25,625
> AutoSavingCache.java (line 289) Saved KeyCache (21181 items) in 342 ms
> 8749:DEBUG [CompactionExecutor:6] 2013-11-27 10:37:25,625
> AutoSavingCache.java (line 233) Deleting old RowCache files.
> 8750: INFO [CompactionExecutor:6] 2013-11-27 10:37:25,759
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 134 ms
> 8751:DEBUG [CompactionExecutor:6] 2013-11-27 10:37:25,759
> AutoSavingCache.java (line 233) Deleting old RowCache files.
> 8752: INFO [CompactionExecutor:6] 2013-11-27 10:37:25,893
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 133 ms
> 8753:DEBUG [CompactionExecutor:6] 2013-11-27 10:37:25,893
> AutoSavingCache.java (line 233) Deleting old RowCache files.
> 8754: INFO [CompactionExecutor:6] 2013-11-27 10:37:26,026
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 133 ms
> 9915:DEBUG [CompactionExecutor:18] 2013-11-27 10:42:01,851
> AutoSavingCache.java (line 233) Deleting old KeyCache files.
> 9916: INFO [CompactionExecutor:18] 2013-11-27 10:42:02,185
> AutoSavingCache.java (line 289) Saved KeyCache (22067 items) in 334 ms
> 9917:DEBUG [CompactionExecutor:17] 2013-11-27 10:42:02,279
> AutoSavingCache.java (line 233) Deleting old RowCache files.
> 9918: INFO [CompactionExecutor:17] 2013-11-27 10:42:02,411
> AutoSavingCache.java (line 289) Saved RowCache (50000 items) in 131 ms
> {noformat}
> {noformat}
> $ ll ~/shared/saved_caches/
> total 3472
> -rw-rw-r-- 1 cassandra cassandra 3551608 Nov 27 10:42 Foo-Bar-RowCache-b.db
> {noformat}
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