Johannes Brucher created SOLR-14251:
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Summary: Shard Split on HDFS
Key: SOLR-14251
URL: https://issues.apache.org/jira/browse/SOLR-14251
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: hdfs
Affects Versions: 8.4
Reporter: Johannes Brucher
Shard Split on HDFS Index will evaluate local disc space instead of HDFS space
When performing a shard split on an index that is stored on HDFS the
SplitShardCmd however evaluates the free disc space on the local file system of
the server where Solr is installed.
SplitShardCmd assumes that its main phase (when the Lucene index is being
split) always executes on the local file system of the shard leader; and indeed
the ShardSplitCmd.checkDiskSpace() checks the local file system's free disk
space - even though the actual data is written to the HDFS Directory so it
(almost) doesn't affect the local FS (except for core.properties file).
See also: [https://lucene.472066.n3.nabble.com/HDFS-Shard-Split-td4449920.html]
My setup to reproduce the issue:
* Solr deployed on Openshift with local disc of about 5GB
* HDFS configuration based on solrconfig.xml with
{code:java}
<directoryFactory name="DirectoryFactory" class="solr.HdfsDirectoryFactory">
<str name="solr.hdfs.home">hdfs://path/to/index/str>
...
{code}
* Split command:
{code:java}
.../admin/collections?action=SPLITSHARD&collection=collection1&shard=shard1&async=1234{code}
* Response:
{code:java}
{
"responseHeader":{"status":0,"QTime":32},
"Operation splitshard caused
exception:":"org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:
not enough free disk space to perform index split on node <solr
instance>:8983_solr, required: 294.64909074269235, available: 5.4632568359375",
"exception":{
"msg":"not enough free disk space to perform index split on node <solr
instance>:8983_solr, required: 294.64909074269235, available: 5.4632568359375",
"rspCode":500},
"status":{"state":"failed","msg":"found [1234] in failed tasks"}
}
{code}
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