Cannot allocate memory exception - AMD64
I am getting the following exception when the heap is only 70 % full on a linux AMD64 system with 16 GB RAM and 2 GB swap , the exception occurs even when there is around 3 GB free memory in the heap , any VM option needs to be set ?
java -Xmx12g -Xms12g RE
java.io.IOException: java.io.IOException: Cannot allocate memory
java.io.IOException: java.io.IOException: Cannot allocate memory
at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
at java.lang.ProcessImpl.start(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
at java.lang.Runtime.exec(Runtime.java:591)
at java.lang.Runtime.exec(Runtime.java:429)
at java.lang.Runtime.exec(Runtime.java:326)
at RE.main(RE.java:22)
I can attach a sample code if required .
paul.miner wrote:
Caffeine0001 wrote:
On linux, Runtime.exec does a fork and execute. That means that you will need double what your current java process is using in virtual memory(real + swap). Given -Xms12g you will need more than 24g of virtual memory space for your code to work as written. And with vm overhead, more likely a few gigs more.Damn, that sucks. Will adding swap space alleviate the problem?
And if you know, does Windows do the same thing?You need at least as much virtual memory free as the parent process is using to do a Runtime.exec() on Solaris and Linux using Sun's VM. So increasing the swap to the point that there is as much free memory as the parent process is using should alleviate the problem. I agree that this sucks. Other VMs may not have this problem.
I think the Sun VM takes a different approach when it exec() a process in Windows.
One workaround is to run a small vm that acts a proxy. This small vm would listen on a socket and executes anything that comes in on that socket. So the 12g parent process would open up a connection to this small vm process and send the commands to it instead of Runtime.exec() and in turn the small vm process would do the actual Runtime.exec().
Similar Messages
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Java.io.IOException: Cannot allocate memory
Hi all,
What is the root cause of java.io.IOException: Cannot allocate memory? the
exception is throws every several days.
the application is a web application that run in WLS 8.1 sp3.
source code that throws the exception like bellow, in a http request, the
method will be called not more than 4 times.
public void doit() throws IOException {
Process process = java.lang.Runtime.getRuntime().exec("chmod 777 -R
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at java.lang.UNIXProcess.<init>(UNIXProcess.java:143)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
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Runtime env overview
1. WLS start commond
/opt/bea/jdk142_04/bin/java -server -Xms2048m -Xmx2048m -XX:PermSize=512m -XX:MaxPermSize=512m
-Dweblogic.Name=myserver -Dweblogic.management.username=wlsUser -Dweblogic.management.password=wlsPWD
-Dweblogic.ProductionModeEnabled=true
2. JVM version /opt/bea/jdk142_04/bin/java -version
java version "1.4.2_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)
3. OS version # uname -a
Linux 2.4.21-9.0.1.ELsmp #1 SMP Mon Feb 9 22:26:51 EST 2004 i686 i686 i386
GNU/Linux
4. top command response
20:29:04 up 5 days, 13:51, 1 user, load average: 0.03, 0.03, 0.00
56 processes: 55 sleeping, 1 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 6.6% 0.0% 0.0% 0.2% 0.0% 0.0% 93.0%
cpu00 0.0% 0.0% 0.0% 0.9% 0.0% 0.0% 99.0%
cpu01 12.8% 0.0% 0.0% 0.0% 0.0% 0.0% 87.1%
cpu02 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0%
cpu03 13.8% 0.0% 0.0% 0.0% 0.0% 0.0% 86.1%
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buff
1327256k active, 1262088k inactive
Swap: 2097136k av, 0k used, 2097136k free 1686144k
cached
Many thanks for reading my post and any advice would be greatly appreciated
Thanks,
SteveHi all,
What is the root cause of java.io.IOException: Cannot allocate memory? the
exception is throws every several days.
the application is a web application that run in WLS 8.1 sp3.
source code that throws the exception like bellow, in a http request, the
method will be called not more than 4 times.
public void doit() throws IOException {
Process process = java.lang.Runtime.getRuntime().exec("chmod 777 -R
/fileroot");
setProcess(process);
Error message:
java.io.IOException: java.io.IOException: Cannot allocate memory
at java.lang.UNIXProcess.<init>(UNIXProcess.java:143)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Runtime.java:566)
at java.lang.Runtime.exec(Runtime.java:428)
at java.lang.Runtime.exec(Runtime.java:364)
at java.lang.Runtime.exec(Runtime.java:326)
Runtime env overview
1. WLS start commond
/opt/bea/jdk142_04/bin/java -server -Xms2048m -Xmx2048m -XX:PermSize=512m -XX:MaxPermSize=512m
-Dweblogic.Name=myserver -Dweblogic.management.username=wlsUser -Dweblogic.management.password=wlsPWD
-Dweblogic.ProductionModeEnabled=true
2. JVM version /opt/bea/jdk142_04/bin/java -version
java version "1.4.2_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)
3. OS version # uname -a
Linux 2.4.21-9.0.1.ELsmp #1 SMP Mon Feb 9 22:26:51 EST 2004 i686 i686 i386
GNU/Linux
4. top command response
20:29:04 up 5 days, 13:51, 1 user, load average: 0.03, 0.03, 0.00
56 processes: 55 sleeping, 1 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 6.6% 0.0% 0.0% 0.2% 0.0% 0.0% 93.0%
cpu00 0.0% 0.0% 0.0% 0.9% 0.0% 0.0% 99.0%
cpu01 12.8% 0.0% 0.0% 0.0% 0.0% 0.0% 87.1%
cpu02 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0%
cpu03 13.8% 0.0% 0.0% 0.0% 0.0% 0.0% 86.1%
Mem: 4124016k av, 2905472k used, 1218544k free, 0k shrd, 153952k
buff
1327256k active, 1262088k inactive
Swap: 2097136k av, 0k used, 2097136k free 1686144k
cached
Many thanks for reading my post and any advice would be greatly appreciated
Thanks,
Steve -
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or
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Cannot allocate memory error in Oracle 10.2.0.2
I am using Oracle 10.2.0.2. When will I get the below error. What to do to resolve this issue. Can somebody help me on this
ROW-00001: Cannot allocate memory||SQLSTATE0=03/18/08 14:27:19
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ROW-00001: Cannot allocate memory||SQLSTATE0=03/18/08 14:27:19
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-- File begining ---
ECHO is on.
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Error Started at Line #: 2096
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TNS-01168: Cannot allocate memory
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-- File ended ---
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Satishalll listeners show the TNS-12531 cannot allocate memory message in the listener.log.Only a single listener is required.
How many listeners run on this system & why more than 1?
oerr tns 12531
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select your .dmg file and open with Disk utility
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Hello,
I am using:
Oracle: Berkeley DB XML 2.5.16: (December 22, 2009)
Berkeley DB 4.8.26: (December 18, 2009)
When attempting to open a container in an environment where the application process has been running for a while I get the following error:
XmlDatabaseError: XmlDatabaseError 12, Error: Cannot allocate memory
The Python bindings do not have support for errcall. I have added errcall support to the bindings but I do not appear to be receiving any message (but it is new code so I do not trust it completely).
Running the dbxml shell tool I get:
[root@localhost db]# dbxml
Joined existing environment
dbxml> open test.dbxml
stdin:1: openContainer failed, Error: Cannot allocate memory
dbxml>I don't appear to be out of locks:
127786 Last allocated locker ID
0x7fffffff Current maximum unused locker ID
9 Number of lock modes
20000 Maximum number of locks possible
10000 Maximum number of lockers possible
20000 Maximum number of lock objects possible
1 Number of lock object partitions
639 Number of current locks
691 Maximum number of locks at any one time
10 Maximum number of locks in any one bucket
0 Maximum number of locks stolen by for an empty partition
0 Maximum number of locks stolen for any one partition
1282 Number of current lockers
1320 Maximum number of lockers at any one time
571 Number of current lock objects
622 Maximum number of lock objects at any one time
3 Maximum number of lock objects in any one bucket
0 Maximum number of objects stolen by for an empty partition
0 Maximum number of objects stolen for any one partition
998958 Total number of locks requested
997936 Total number of locks released
0 Total number of locks upgraded
13055 Total number of locks downgraded
0 Lock requests not available due to conflicts, for which we waited
0 Lock requests not available due to conflicts, for which we did not wait
0 Number of deadlocks
0 Lock timeout value
0 Number of locks that have timed out
0 Transaction timeout value
0 Number of transactions that have timed out
10MB 152KB The size of the lock region
0 The number of partition locks that required waiting (0%)
0 The maximum number of times any partition lock was waited for (0%)
0 The number of object queue operations that required waiting (0%)
0 The number of locker allocations that required waiting (0%)
0 The number of region locks that required waiting (0%)
3 Maximum hash bucket lengthOr transactions:
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
35511/10059360 File/offset for last checkpoint LSN
Thu Aug 12 17:25:26 2010 Checkpoint timestamp
0x80007128 Last transaction ID allocated
100 Maximum number of active transactions configured
0 Active transactions
3 Maximum active transactions
28968 Number of transactions begun
16699 Number of transactions aborted
12269 Number of transactions committed
0 Snapshot transactions
0 Maximum snapshot transactions
0 Number of transactions restored
40KB Transaction region size
0 The number of region locks that required waiting (0%)
Active transactions:Or mutexes:
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
6MB 112KB Mutex region size
0 The number of region locks that required waiting (0%)
4 Mutex alignment
1 Mutex test-and-set spins
50000 Mutex total count
39829 Mutex free count
10171 Mutex in-use count
10201 Mutex maximum in-use count
Mutex counts
39829 Unallocated
509 db handle
1 env dblist
2 env handle
1 env region
4 lock region
691 logical lock
1 log filename
1 log flush
2 log region
815 mpoolfile handle
3896 mpool buffer
63 mpool filehandle
17 mpool file bucket
1 mpool handle
4099 mpool hash bucket
1 mpool region
1 mutex region
62 sequence
1 twister
1 txn active list
1 transaction checkpoint
1 txn regionAny ideas?See unable to allocate memory for mutex; resize mutex region
Edited by: Vitaliy Katochka on Nov 23, 2010 4:31 PM
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