[CASSANDRA-9285] LEAK DETECTED in sstwriter

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Won't Fix
• Fix Version/s: 2.1.x
• Component/s: Legacy/Local Write-Read Paths
• Severity: Normal
• Since Version: 2.1.5
• Assignee: Unassigned
• Reporter: Pierre N.

Reviewers

Yuki Morishita

• Created: 01/May/15 14:17
• Updated: 16/Apr/19 09:31
• Resolved: 15/Mar/16 00:24

Description

reproduce bug :

    public static void main(String[] args) throws Exception {
        System.setProperty("cassandra.debugrefcount","true");
        
        String ks = "ks1";
        String table = "t1";
        
        String schema = "CREATE TABLE " + ks + "." + table + "(a1 INT, PRIMARY KEY (a1));";
        String insert = "INSERT INTO "+ ks + "." + table + "(a1) VALUES(?);";
        
        File dir = new File("/var/tmp/" + ks + "/" + table);
        dir.mkdirs();
        
        CQLSSTableWriter writer = CQLSSTableWriter.builder().forTable(schema).using(insert).inDirectory(dir).build();
        
        writer.addRow(1);
        writer.close();
        writer = null;
        
        Thread.sleep(1000);System.gc();
        Thread.sleep(1000);System.gc();
    }

[2015-05-01 16:09:59,139] [Reference-Reaper:1] ERROR org.apache.cassandra.utils.concurrent.Ref - LEAK DETECTED: a reference (org.apache.cassandra.utils.concurrent.Ref$State@79fa9da9) to class org.apache.cassandra.io.util.SafeMemory$MemoryTidy@2053866990:Memory@[7f87f8043b20..7f87f8043b48) was not released before the reference was garbage collected
[2015-05-01 16:09:59,143] [Reference-Reaper:1] ERROR org.apache.cassandra.utils.concurrent.Ref - Allocate trace org.apache.cassandra.utils.concurrent.Ref$State@79fa9da9:
Thread[Thread-2,5,main]
at java.lang.Thread.getStackTrace(Thread.java:1552)
at org.apache.cassandra.utils.concurrent.Ref$Debug.<init>(Ref.java:200)
at org.apache.cassandra.utils.concurrent.Ref$State.<init>(Ref.java:133)
at org.apache.cassandra.utils.concurrent.Ref.<init>(Ref.java:60)
at org.apache.cassandra.io.util.SafeMemory.<init>(SafeMemory.java:32)
at org.apache.cassandra.io.util.SafeMemoryWriter.<init>(SafeMemoryWriter.java:33)
at org.apache.cassandra.io.sstable.IndexSummaryBuilder.<init>(IndexSummaryBuilder.java:111)
at org.apache.cassandra.io.sstable.SSTableWriter$IndexWriter.<init>(SSTableWriter.java:576)
at org.apache.cassandra.io.sstable.SSTableWriter.<init>(SSTableWriter.java:140)
at org.apache.cassandra.io.sstable.AbstractSSTableSimpleWriter.getWriter(AbstractSSTableSimpleWriter.java:58)
at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter$DiskWriter.run(SSTableSimpleUnsortedWriter.java:227)

[2015-05-01 16:09:59,144] [Reference-Reaper:1] ERROR org.apache.cassandra.utils.concurrent.Ref - LEAK DETECTED: a reference (org.apache.cassandra.utils.concurrent.Ref$State@664382e3) to class org.apache.cassandra.io.util.SafeMemory$MemoryTidy@899100784:Memory@[7f87f8043990..7f87f8043994) was not released before the reference was garbage collected
[2015-05-01 16:09:59,144] [Reference-Reaper:1] ERROR org.apache.cassandra.utils.concurrent.Ref - Allocate trace org.apache.cassandra.utils.concurrent.Ref$State@664382e3:
Thread[Thread-2,5,main]
at java.lang.Thread.getStackTrace(Thread.java:1552)
at org.apache.cassandra.utils.concurrent.Ref$Debug.<init>(Ref.java:200)
at org.apache.cassandra.utils.concurrent.Ref$State.<init>(Ref.java:133)
at org.apache.cassandra.utils.concurrent.Ref.<init>(Ref.java:60)
at org.apache.cassandra.io.util.SafeMemory.<init>(SafeMemory.java:32)
at org.apache.cassandra.io.util.SafeMemoryWriter.<init>(SafeMemoryWriter.java:33)
at org.apache.cassandra.io.sstable.IndexSummaryBuilder.<init>(IndexSummaryBuilder.java:110)
at org.apache.cassandra.io.sstable.SSTableWriter$IndexWriter.<init>(SSTableWriter.java:576)
at org.apache.cassandra.io.sstable.SSTableWriter.<init>(SSTableWriter.java:140)
at org.apache.cassandra.io.sstable.AbstractSSTableSimpleWriter.getWriter(AbstractSSTableSimpleWriter.java:58)
at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter$DiskWriter.run(SSTableSimpleUnsortedWriter.java:227)

[2015-05-01 16:09:59,144] [Reference-Reaper:1] ERROR org.apache.cassandra.utils.concurrent.Ref - LEAK DETECTED: a reference (org.apache.cassandra.utils.concurrent.Ref$State@3cca0ac2) to class org.apache.cassandra.io.util.SafeMemory$MemoryTidy@499043670:Memory@[7f87f8039940..7f87f8039c60) was not released before the reference was garbage collected
[2015-05-01 16:09:59,144] [Reference-Reaper:1] ERROR org.apache.cassandra.utils.concurrent.Ref - Allocate trace org.apache.cassandra.utils.concurrent.Ref$State@3cca0ac2:
Thread[Thread-2,5,main]
at java.lang.Thread.getStackTrace(Thread.java:1552)
at org.apache.cassandra.utils.concurrent.Ref$Debug.<init>(Ref.java:200)
at org.apache.cassandra.utils.concurrent.Ref$State.<init>(Ref.java:133)
at org.apache.cassandra.utils.concurrent.Ref.<init>(Ref.java:60)
at org.apache.cassandra.io.util.SafeMemory.<init>(SafeMemory.java:32)
at org.apache.cassandra.io.compress.CompressionMetadata$Writer.<init>(CompressionMetadata.java:274)
at org.apache.cassandra.io.compress.CompressionMetadata$Writer.open(CompressionMetadata.java:285)
at org.apache.cassandra.io.compress.CompressedSequentialWriter.<init>(CompressedSequentialWriter.java:74)
at org.apache.cassandra.io.util.SequentialWriter.open(SequentialWriter.java:124)
at org.apache.cassandra.io.sstable.SSTableWriter.<init>(SSTableWriter.java:129)
at org.apache.cassandra.io.sstable.AbstractSSTableSimpleWriter.getWriter(AbstractSSTableSimpleWriter.java:58)
at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter$DiskWriter.run(SSTableSimpleUnsortedWriter.java:227)