Grokbase Groups Lucene dev July 2011
FAQ
We still have a deadlock! I killed the 3.x build few minutes ago.

-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: uwe@thetaphi.de

-----Original Message-----
From: mikemccand@apache.org
Sent: Monday, July 25, 2011 3:09 PM
To: commits@lucene.apache.org
Subject: svn commit: r1150683 - in /lucene/dev/branches/branch_3x/lucene:
CHANGES.txt src/java/org/apache/lucene/index/DocumentsWriter.java

Author: mikemccand
Date: Mon Jul 25 13:09:28 2011
New Revision: 1150683

URL: http://svn.apache.org/viewvc?rev=1150683&view=rev
Log:
LUCENE-3339: fix deadlock case when multiple threads add/update doc
blocks

Modified:
lucene/dev/branches/branch_3x/lucene/CHANGES.txt

lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
/DocumentsWriter.java

Modified: lucene/dev/branches/branch_3x/lucene/CHANGES.txt
URL:
http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/CHA
NGES.txt?rev=1150683&r1=1150682&r2=1150683&view=diff
==========================================================
====================
--- lucene/dev/branches/branch_3x/lucene/CHANGES.txt (original)
+++ lucene/dev/branches/branch_3x/lucene/CHANGES.txt Mon Jul 25
13:09:28 2011
@@ -26,6 +26,10 @@ Bug fixes
suppressed exceptions in the original exception, so stack trace
will contain them. (Uwe Schindler)

+* LUCENE-3339: Fixed deadlock case when multiple threads use the new
+ block-add (IndexWriter.add/updateDocuments) methods. (Robert Muir,
+ Mike McCandless)
+
New Features

* LUCENE-3290: Added FieldInvertState.numUniqueTerms

Modified:
lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
/DocumentsWriter.java
URL:
http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/src/
java/org/apache/lucene/index/DocumentsWriter.java?rev=1150683&r1=115
0682&r2=1150683&view=diff
==========================================================
====================
---
lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
/DocumentsWriter.java (original)
+++
lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
/DocumentsWriter.java Mon Jul 25 13:09:28 2011
@@ -843,6 +843,12 @@ final class DocumentsWriter {
final int startDocID = docState.docID;
int docID = startDocID;

+ // We must delay pausing until the full doc block is
+ // added, else we can hit deadlock if more than one
+ // thread is adding a block and we need to pause when
+ // both are only part way done:
+ boolean doPauseWaitQueue = false;
+
//System.out.println(Thread.currentThread().getName() + ": A " +
docCount);
for(Document doc : docs) {
docState.doc = doc;
@@ -873,13 +879,10 @@ final class DocumentsWriter {
assert perDoc == null || perDoc.docID == docState.docID;
final boolean doPause;
if (perDoc != null) {
- doPause = waitQueue.add(perDoc);
+ doPauseWaitQueue |= waitQueue.add(perDoc);
} else {
skipDocWriter.docID = docState.docID;
- doPause = waitQueue.add(skipDocWriter);
- }
- if (doPause) {
- waitForWaitQueue();
+ doPauseWaitQueue |= waitQueue.add(skipDocWriter);
}
}

@@ -937,6 +940,10 @@ final class DocumentsWriter {
}
}
}
+
+ if (doPauseWaitQueue) {
+ waitForWaitQueue();
+ }
}
//System.out.println(Thread.currentThread().getName() + ": A " +
docCount);


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Search Discussions

  • Simon Willnauer at Jul 26, 2011 at 9:13 am
    without looking at the actual code I would say the
    if(doPauseWaitQueue) should be while(doPauseWaitQueue)?
    On Tue, Jul 26, 2011 at 9:07 AM, Uwe Schindler wrote:
    We still have a deadlock! I killed the 3.x build few minutes ago.

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: mikemccand@apache.org
    Sent: Monday, July 25, 2011 3:09 PM
    To: commits@lucene.apache.org
    Subject: svn commit: r1150683 - in /lucene/dev/branches/branch_3x/lucene:
    CHANGES.txt src/java/org/apache/lucene/index/DocumentsWriter.java

    Author: mikemccand
    Date: Mon Jul 25 13:09:28 2011
    New Revision: 1150683

    URL: http://svn.apache.org/viewvc?rev=1150683&view=rev
    Log:
    LUCENE-3339: fix deadlock case when multiple threads add/update doc
    blocks

    Modified:
    lucene/dev/branches/branch_3x/lucene/CHANGES.txt

    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java

    Modified: lucene/dev/branches/branch_3x/lucene/CHANGES.txt
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/CHA
    NGES.txt?rev=1150683&r1=1150682&r2=1150683&view=diff
    ==========================================================
    ====================
    --- lucene/dev/branches/branch_3x/lucene/CHANGES.txt (original)
    +++ lucene/dev/branches/branch_3x/lucene/CHANGES.txt Mon Jul 25
    13:09:28 2011
    @@ -26,6 +26,10 @@ Bug fixes
    suppressed exceptions in the original exception, so stack trace
    will contain them.  (Uwe Schindler)

    +* LUCENE-3339: Fixed deadlock case when multiple threads use the new
    +  block-add (IndexWriter.add/updateDocuments) methods.  (Robert Muir,
    +  Mike McCandless)
    +
    New Features

    * LUCENE-3290: Added FieldInvertState.numUniqueTerms

    Modified:
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/src/
    java/org/apache/lucene/index/DocumentsWriter.java?rev=1150683&r1=115
    0682&r2=1150683&view=diff
    ==========================================================
    ====================
    ---
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java (original)
    +++
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java Mon Jul 25 13:09:28 2011
    @@ -843,6 +843,12 @@ final class DocumentsWriter {
    final int startDocID = docState.docID;
    int docID = startDocID;

    +    // We must delay pausing until the full doc block is
    +    // added, else we can hit deadlock if more than one
    +    // thread is adding a block and we need to pause when
    +    // both are only part way done:
    +    boolean doPauseWaitQueue = false;
    +
    //System.out.println(Thread.currentThread().getName() + ": A " +
    docCount);
    for(Document doc : docs) {
    docState.doc = doc;
    @@ -873,13 +879,10 @@ final class DocumentsWriter {
    assert perDoc == null || perDoc.docID == docState.docID;
    final boolean doPause;
    if (perDoc != null) {
    -            doPause = waitQueue.add(perDoc);
    +            doPauseWaitQueue |= waitQueue.add(perDoc);
    } else {
    skipDocWriter.docID = docState.docID;
    -            doPause = waitQueue.add(skipDocWriter);
    -          }
    -          if (doPause) {
    -            waitForWaitQueue();
    +            doPauseWaitQueue |= waitQueue.add(skipDocWriter);
    }
    }

    @@ -937,6 +940,10 @@ final class DocumentsWriter {
    }
    }
    }
    +
    +      if (doPauseWaitQueue) {
    +        waitForWaitQueue();
    +      }
    }
    //System.out.println(Thread.currentThread().getName() + ":   A " +
    docCount);


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  • Michael McCandless at Jul 26, 2011 at 11:06 am
    Ugh, I'll dig.

    Uwe was it hung on TestNRTThreads again? And the stack dump looked
    the same as LUCENE-3339?

    Mike McCandless

    http://blog.mikemccandless.com
    On Tue, Jul 26, 2011 at 3:07 AM, Uwe Schindler wrote:
    We still have a deadlock! I killed the 3.x build few minutes ago.

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: mikemccand@apache.org
    Sent: Monday, July 25, 2011 3:09 PM
    To: commits@lucene.apache.org
    Subject: svn commit: r1150683 - in /lucene/dev/branches/branch_3x/lucene:
    CHANGES.txt src/java/org/apache/lucene/index/DocumentsWriter.java

    Author: mikemccand
    Date: Mon Jul 25 13:09:28 2011
    New Revision: 1150683

    URL: http://svn.apache.org/viewvc?rev=1150683&view=rev
    Log:
    LUCENE-3339: fix deadlock case when multiple threads add/update doc
    blocks

    Modified:
    lucene/dev/branches/branch_3x/lucene/CHANGES.txt

    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java

    Modified: lucene/dev/branches/branch_3x/lucene/CHANGES.txt
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/CHA
    NGES.txt?rev=1150683&r1=1150682&r2=1150683&view=diff
    ==========================================================
    ====================
    --- lucene/dev/branches/branch_3x/lucene/CHANGES.txt (original)
    +++ lucene/dev/branches/branch_3x/lucene/CHANGES.txt Mon Jul 25
    13:09:28 2011
    @@ -26,6 +26,10 @@ Bug fixes
    suppressed exceptions in the original exception, so stack trace
    will contain them.  (Uwe Schindler)

    +* LUCENE-3339: Fixed deadlock case when multiple threads use the new
    +  block-add (IndexWriter.add/updateDocuments) methods.  (Robert Muir,
    +  Mike McCandless)
    +
    New Features

    * LUCENE-3290: Added FieldInvertState.numUniqueTerms

    Modified:
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/src/
    java/org/apache/lucene/index/DocumentsWriter.java?rev=1150683&r1=115
    0682&r2=1150683&view=diff
    ==========================================================
    ====================
    ---
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java (original)
    +++
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java Mon Jul 25 13:09:28 2011
    @@ -843,6 +843,12 @@ final class DocumentsWriter {
    final int startDocID = docState.docID;
    int docID = startDocID;

    +    // We must delay pausing until the full doc block is
    +    // added, else we can hit deadlock if more than one
    +    // thread is adding a block and we need to pause when
    +    // both are only part way done:
    +    boolean doPauseWaitQueue = false;
    +
    //System.out.println(Thread.currentThread().getName() + ": A " +
    docCount);
    for(Document doc : docs) {
    docState.doc = doc;
    @@ -873,13 +879,10 @@ final class DocumentsWriter {
    assert perDoc == null || perDoc.docID == docState.docID;
    final boolean doPause;
    if (perDoc != null) {
    -            doPause = waitQueue.add(perDoc);
    +            doPauseWaitQueue |= waitQueue.add(perDoc);
    } else {
    skipDocWriter.docID = docState.docID;
    -            doPause = waitQueue.add(skipDocWriter);
    -          }
    -          if (doPause) {
    -            waitForWaitQueue();
    +            doPauseWaitQueue |= waitQueue.add(skipDocWriter);
    }
    }

    @@ -937,6 +940,10 @@ final class DocumentsWriter {
    }
    }
    }
    +
    +      if (doPauseWaitQueue) {
    +        waitForWaitQueue();
    +      }
    }
    //System.out.println(Thread.currentThread().getName() + ":   A " +
    docCount);


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  • Uwe Schindler at Jul 26, 2011 at 12:12 pm
    Sorry, I missed to create a stack dump :(
    What was the signal for that? -HUP -TERM -KILL?

    Uwe

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: Michael McCandless
    Sent: Tuesday, July 26, 2011 1:06 PM
    To: dev@lucene.apache.org
    Subject: Re: svn commit: r1150683 - in
    /lucene/dev/branches/branch_3x/lucene: CHANGES.txt
    src/java/org/apache/lucene/index/DocumentsWriter.java

    Ugh, I'll dig.

    Uwe was it hung on TestNRTThreads again? And the stack dump looked the
    same as LUCENE-3339?

    Mike McCandless

    http://blog.mikemccandless.com
    On Tue, Jul 26, 2011 at 3:07 AM, Uwe Schindler wrote:
    We still have a deadlock! I killed the 3.x build few minutes ago.

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: mikemccand@apache.org
    Sent: Monday, July 25, 2011 3:09 PM
    To: commits@lucene.apache.org
    Subject: svn commit: r1150683 - in
    /lucene/dev/branches/branch_3x/lucene:
    CHANGES.txt src/java/org/apache/lucene/index/DocumentsWriter.java

    Author: mikemccand
    Date: Mon Jul 25 13:09:28 2011
    New Revision: 1150683

    URL: http://svn.apache.org/viewvc?rev=1150683&view=rev
    Log:
    LUCENE-3339: fix deadlock case when multiple threads add/update doc
    blocks

    Modified:
    lucene/dev/branches/branch_3x/lucene/CHANGES.txt
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java

    Modified: lucene/dev/branches/branch_3x/lucene/CHANGES.txt
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/CHA
    NGES.txt?rev=1150683&r1=1150682&r2=1150683&view=diff
    ==========================================================
    ====================
    --- lucene/dev/branches/branch_3x/lucene/CHANGES.txt (original)
    +++ lucene/dev/branches/branch_3x/lucene/CHANGES.txt Mon Jul 25
    13:09:28 2011
    @@ -26,6 +26,10 @@ Bug fixes
    suppressed exceptions in the original exception, so stack trace
    will contain them.  (Uwe Schindler)

    +* LUCENE-3339: Fixed deadlock case when multiple threads use the new
    +  block-add (IndexWriter.add/updateDocuments) methods.  (Robert
    +Muir,
    +  Mike McCandless)
    +
    New Features

    * LUCENE-3290: Added FieldInvertState.numUniqueTerms

    Modified:
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/src
    /
    java/org/apache/lucene/index/DocumentsWriter.java?rev=1150683&r1=115
    0682&r2=1150683&view=diff
    ==========================================================
    ====================
    ---
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java (original)
    +++
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java Mon Jul 25 13:09:28 2011 @@ -843,6 +843,12 @@
    final class DocumentsWriter {
    final int startDocID = docState.docID;
    int docID = startDocID;

    +    // We must delay pausing until the full doc block is
    +    // added, else we can hit deadlock if more than one
    +    // thread is adding a block and we need to pause when
    +    // both are only part way done:
    +    boolean doPauseWaitQueue = false;
    +
    //System.out.println(Thread.currentThread().getName() + ": A " +
    docCount);
    for(Document doc : docs) {
    docState.doc = doc;
    @@ -873,13 +879,10 @@ final class DocumentsWriter {
    assert perDoc == null || perDoc.docID == docState.docID;
    final boolean doPause;
    if (perDoc != null) {
    -            doPause = waitQueue.add(perDoc);
    +            doPauseWaitQueue |= waitQueue.add(perDoc);
    } else {
    skipDocWriter.docID = docState.docID;
    -            doPause = waitQueue.add(skipDocWriter);
    -          }
    -          if (doPause) {
    -            waitForWaitQueue();
    +            doPauseWaitQueue |= waitQueue.add(skipDocWriter);
    }
    }

    @@ -937,6 +940,10 @@ final class DocumentsWriter {
    }
    }
    }
    +
    +      if (doPauseWaitQueue) {
    +        waitForWaitQueue();
    +      }
    }
    //System.out.println(Thread.currentThread().getName() + ":   A "
    + docCount);


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  • Michael McCandless at Jul 26, 2011 at 12:30 pm
    No problem -- I think I see what's causing the deadlock (still).

    I think it's (confusingly!) kill -QUIT to get the thread stacks.

    Mike McCandless

    http://blog.mikemccandless.com
    On Tue, Jul 26, 2011 at 8:12 AM, Uwe Schindler wrote:
    Sorry, I missed to create a stack dump :(
    What was the signal for that? -HUP -TERM -KILL?

    Uwe

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: Michael McCandless
    Sent: Tuesday, July 26, 2011 1:06 PM
    To: dev@lucene.apache.org
    Subject: Re: svn commit: r1150683 - in
    /lucene/dev/branches/branch_3x/lucene: CHANGES.txt
    src/java/org/apache/lucene/index/DocumentsWriter.java

    Ugh, I'll dig.

    Uwe was it hung on TestNRTThreads again?  And the stack dump looked the
    same as LUCENE-3339?

    Mike McCandless

    http://blog.mikemccandless.com
    On Tue, Jul 26, 2011 at 3:07 AM, Uwe Schindler wrote:
    We still have a deadlock! I killed the 3.x build few minutes ago.

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: mikemccand@apache.org
    Sent: Monday, July 25, 2011 3:09 PM
    To: commits@lucene.apache.org
    Subject: svn commit: r1150683 - in
    /lucene/dev/branches/branch_3x/lucene:
    CHANGES.txt src/java/org/apache/lucene/index/DocumentsWriter.java

    Author: mikemccand
    Date: Mon Jul 25 13:09:28 2011
    New Revision: 1150683

    URL: http://svn.apache.org/viewvc?rev=1150683&view=rev
    Log:
    LUCENE-3339: fix deadlock case when multiple threads add/update doc
    blocks

    Modified:
    lucene/dev/branches/branch_3x/lucene/CHANGES.txt
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java

    Modified: lucene/dev/branches/branch_3x/lucene/CHANGES.txt
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/CHA
    NGES.txt?rev=1150683&r1=1150682&r2=1150683&view=diff
    ==========================================================
    ====================
    --- lucene/dev/branches/branch_3x/lucene/CHANGES.txt (original)
    +++ lucene/dev/branches/branch_3x/lucene/CHANGES.txt Mon Jul 25
    13:09:28 2011
    @@ -26,6 +26,10 @@ Bug fixes
    suppressed exceptions in the original exception, so stack trace
    will contain them.  (Uwe Schindler)

    +* LUCENE-3339: Fixed deadlock case when multiple threads use the new
    +  block-add (IndexWriter.add/updateDocuments) methods.  (Robert
    +Muir,
    +  Mike McCandless)
    +
    New Features

    * LUCENE-3290: Added FieldInvertState.numUniqueTerms

    Modified:
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java
    URL:
    http://svn.apache.org/viewvc/lucene/dev/branches/branch_3x/lucene/src
    /
    java/org/apache/lucene/index/DocumentsWriter.java?rev=1150683&r1=115
    0682&r2=1150683&view=diff
    ==========================================================
    ====================
    ---
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java (original)
    +++
    lucene/dev/branches/branch_3x/lucene/src/java/org/apache/lucene/index
    /DocumentsWriter.java Mon Jul 25 13:09:28 2011 @@ -843,6 +843,12 @@
    final class DocumentsWriter {
    final int startDocID = docState.docID;
    int docID = startDocID;

    +    // We must delay pausing until the full doc block is
    +    // added, else we can hit deadlock if more than one
    +    // thread is adding a block and we need to pause when
    +    // both are only part way done:
    +    boolean doPauseWaitQueue = false;
    +
    //System.out.println(Thread.currentThread().getName() + ": A " +
    docCount);
    for(Document doc : docs) {
    docState.doc = doc;
    @@ -873,13 +879,10 @@ final class DocumentsWriter {
    assert perDoc == null || perDoc.docID == docState.docID;
    final boolean doPause;
    if (perDoc != null) {
    -            doPause = waitQueue.add(perDoc);
    +            doPauseWaitQueue |= waitQueue.add(perDoc);
    } else {
    skipDocWriter.docID = docState.docID;
    -            doPause = waitQueue.add(skipDocWriter);
    -          }
    -          if (doPause) {
    -            waitForWaitQueue();
    +            doPauseWaitQueue |= waitQueue.add(skipDocWriter);
    }
    }

    @@ -937,6 +940,10 @@ final class DocumentsWriter {
    }
    }
    }
    +
    +      if (doPauseWaitQueue) {
    +        waitForWaitQueue();
    +      }
    }
    //System.out.println(Thread.currentThread().getName() + ":   A "
    + docCount);


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postedJul 26, '11 at 7:08a
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